All Wiring Diagrams for Buick Lucerne CXS 2008 model

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008:

(in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) j210
(lower left rear of engine)
(under driver's seat) g300
(under right front passenger's seat) g304
3.8l
4.6l
5 volt ref
A/c compressor clutch (on a/c compressor)
Air temp motor ctrl
Ambient air temp sens sig
Ambient air temperature sensor (on center front of engine compt, on hood latch brace)
Backlight lamp ctrl
Batt pos vol
Batt pos volt
Blower motor (behind right side of dash)
Blower motor control module (near blower motor)
Body control module (bcm) (right of glove box)
Computer data lines system
Defogger system
Driver information center (dic) display
Drv air temp dr ctrl a
Drv air temp dr ctrl b
Drv air temp dr pos sig
Evap low temp sens sig
Evaporator temperature sensor (left of blower motor)
G112
G115
G300 (under driver's seat)
Gmlan serial data
Gnd
Hot at all times
Hvac control module
Ign 1 volt
Inside air temp sens sig
Inside air temperature sensor (under left side of dash, left of steering column)
Interior lights system
J106
J200
J202
J203
J387
L sunload sens sig
Led dimming sig
Logic
Low ref
Low speed gmlan serial data
Lower mode dr ctrl b
Lower mode dr pos sig
Mode door control a
Mtr fuse 48 10a
Pass air temp dr ctrl b
Pass air temp dr pos
Passkey fuse 13 10a
Pnk
Power distribution system
R sunload sens sig
Radio
Rear defog rly ctrl
Rear fuse block (below left side of rear seat)
Recir dr ctrl a
Recir dr ctrl b
Recir valve sol sig
Recirculation actuator (behind right side of dash, right of blower motor)
Speed ctrl
Sunload twilight sensor (top center of dash)
Tan
X4 b

Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008:

(3.8l)
(3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt) engine control module (ecm) powertrain control module (pcm)
(4.6l)
(in hvac harness, between evaporator temperature sensor & x202) j227
(in hvac harness, between hvac control module & mode motors)
(or tan)
3.8l
4.6l
5v ref 1
87a
A/c cltch fuse 4 10a
A/c cltch relay 34
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
Clutch rly ctrl
Computer data lines system
Driver air temperature actuator (left side of hvac module)
Ect sens sig
Engine coolant temperature (ect) sensor (3.8l: left rear of engine) (4.6l: right rear of engine)
Fan 1 fuse 27 30a
Fan 1 relay
Fan 2 fuse 26 30a
Fan 2 relay
Fan 3 relay
Front passenger air temperature actuator (right side of hvac module)
G104 (right front corner of engine compt)
Gmlan serial data +
Gmlan serial data -
Hi speed rly ctrl
Hot at all times
Hot w/ ign relay energized
Hot w/ pwr/trn relay energized
Hvac/ ipc ign 1 fuse 10 10a
J226
Left cooling fan (on left rear side of radiator)
Low ref
Low speed rly ctrl
Mode actuator (on right side of hvac module)
Oxy snsr fuse 6 15a
Pnk
Press sens sig
Right cooling fan (on right rear side of radiator)
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

Compressor Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Compressor Wiring Diagram for Buick Lucerne CXS 2008:

(lower left rear of engine)
3.8l
4.6l
4.6l 3.8l
5 volt ref 1
A/c cltch fuse 4 10a
A/c cltch relay
A/c compressor clutch (on a/c compressor)
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
Clutch rly ctrl
Computer data lines system
G112
G115
Gmlan serial data +
Gmlan serial data -
Hot at all times
Hot in run or start
J106
Low ref
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt)
Sensor signal
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

Manual A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008

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List of elements for Manual A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008:

(in hvac harness, between evaporator temperature sensor & x202)
(in hvac harness, between hvac control module & mode motors)
(in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) j210
(under right front passenger's seat) g304
5 volt ref
A/c compressor clutch (on a/c compressor)
Air temp dr ctrl b
Air temp dr pos sig
Air temperature actuator (right side of hvac module)
Ambient air temp sens sig
Ambient air temperature sensor (on center front of engine compt, on hood latch brace)
Backlight lamp ctrl
Batt pos vol
Batt pos volt
Blower fuse 49 40a
Blower motor (behind right side of dash)
Blower motor control module (near blower motor)
Computer data lines system
Defogger system
Drv air temp dr ctrl a
Evap low temp sens sig
Evap temperature sensor (left of blower motor)
G112 (lower left rear of engine)
G300 (under driver's seat)
Gnd
Hot at all times
Hvac control module
Ign 1 volt
Interior lights system
J200
J203
J226
J227
J387
Led dimming sig
Logic
Low mode dr pos sig
Low ref
Low speed gmlan serial data
Lower mode dr ctrl b
Mode actuator (on right side of hvac module)
Mode dr ctrl a
Passkey fuse 13 10a
Pnk
Power distribution system
Rear defog rly ctrl
Rear fuse block (below left side of rear seat)
Recir door a ctrl
Recir door b ctrl
Recirculation actuator (behind right side of dash, right of blower motor)
Speed ctrl
Tan
X4 b

Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008:

(under driver's seat) g300
5v ref 1
87a
A/c cltch fuse 4 10a
A/c cltch relay 34
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
Accessory wake up
Ambient light sensor (center of dash, in defroster deflector)
Body control module (bcm) (right of glove box)
Clutch rly ctrl
Computer data lines system
Ect sens sig
Engine coolant temperature (ect) sensor (left rear of engine)
Fan 1 fuse 27 30a
Fan 1 relay
Fan 2 fuse 26 30a
Fan 2 relay
Fan 3 relay
G104 (right front corner of engine compt)
Gmlan serial data +
Gmlan serial data -
Hi speed rly ctrl
Hot at all times
Hot w/ ign relay energized
Hot w/ pwr/trn relay energized
Hvac/ipc ign 1 fuse 10 10a
J203
J229
Left cooling fan (on left rear side of radiator)
Low ref
Low speed rly ctrl
Oxy snsr fuse 6 15a
Pnk
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Press sens sig
Right cooling fan (on right rear side of radiator)
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008

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List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008:

(base of steering column) (w/ active brake control) steering angle sensor
(not used)
(on floor pan, left of center console) (w/ active brake control) yaw & lateral acceleration sensor
5v ref
Abs fuse 23 50a
Abs ind
Abs mtr fuse 25 60a
Batt pos volt
Brake pressure modulator valve (bpmv)
Computer data lines system
Electronic brake control module (ebcm) (left front corner of engine compt)
Electronic power steering system
Erometer sig long accel-
G114 (lower left rear of engine)
Gmlan (bcm)
Gmlan (ebcm)
Ground
High effort ctrl
Hot at all times
Hot w/ ign relay energized
Hvac/ ipc ign 1 fuse 10 10a
Ign
Ign 1 volt
Instrument panel cluster (ipc)
Lateral accel- remitter sig
Lateral accelerometer sig
Logic
Long accelerometer signal
Low effort ctrl
Low ref
Low reference
Pnk
Position signal a
Position signal b
Power distribution system
Radio
Red
Sensor signal
Serial data
Serial data (+)
Serial data (-)
Serial data wake up
Stability control ind
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle speed signal
Vss
Yaw rate diagnostic
Yaw rate sensor sig

Anti-lock Brakes Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008:

(in engine harness, approximately 47 cm (19 in) from right front wheel speed sensor) j114
(in engine harness, approximately 53 cm (21 in) from left front wheel speed sensor) j113
(in engine harness, approximately 53 cm (21 in) from right front wheel speed sensor) j116
(under right front passenger's seat) (w/o individual seat) g304
(w/ individual seat) j204
Body control module (bcm) (right of glove box)
Brake pedal position sensor (top of brake pedal assembly)
Computer data lines system
G300 (w/ individual seat) (under driver's seat)
Interior lights system
J115 (in engine harness, approximately 59 cm (24 in) from left front wheel speed sensor)
J383 (w/o individual seat)
Left front wheel speed sensor (wss) (on left front brake assembly, on back of hub)
Left rear wheel speed sensor (wss) (on left rear brake assembly, on back of hub)
Low reference
Right front wheel speed sensor (wss) (on right front brake assembly, on back of hub)
Right rear wheel speed sensor (wss) (on right rear brake assembly, on back of hub)
Sensor signal
Serial data
Serial data (+)
Serial data (-)
Serial data wake up
Supp volt
Switch signal
Tan
Traction control off
Traction control switch
W/ individual seat
W/o individual seat

ANTI-THEFT

Forced Entry Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Forced Entry Wiring Diagram for Buick Lucerne CXS 2008:

(in body harness, approximately 9 cm (3 in) from branch for x314) j343
(under center of rear package shelf) remote control door lock receiver (rcdlr)
(under left rear seat) g301
A11
A12
Battery
Body control module (bcm) (right of glove box)
Computer data lines system
Ddm fuse 22 15a
Dr lock act ctrl
Dr unlock act ctrl
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Drv dr key sw sig
Exterior lights system
Front passenger door latch assembly (rear of front passenger's door)
Front passenger door module (fpdm)
G104 (right front corner of engine compt)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
Gmlan serial data
Ground
Hood ajar sw sig
Hood ajar switch (w/ remote keyless entry) (center front of engine compt)
Hood closed sw sig
Horn rly ctrl
Horns system
Hot at all times
Ign
Instrument panel cluster (ipc)
J301
J337
J385
J700
J800
Keyless entry antenna
Keyless entry antenna sig
Left rear door latch assembly (rear of left rear door)
Lf dr ajar sw sig
Lf dr open sw sig
Lf dr sw low ref
Lock relay 63
Logic
Low spd gmlan ser data
Lr dr ajar sw sig
Lr dr lk mtr unlock
Lr dr open sw sig
Mdls- body fuse 43 10a
Nca
Park lamp rly ctrl
Pdm fuse 29 15a
Pwr wdo circuit breaker 25a
Rear fuse block (below left side of rear seat)
Rf dr ajar sw sig
Rf dr open sw sig
Rf dr sw low ref
Right rear door latch assembly (rear of right rear door)
Rr dr ajar sw sig
Rr dr lk mtr unlock
Security ind
Serial data
Tan
Tan/ red
Tan/red
Unlock relay 62
Unlock/ lock fuse 14 20a
W/ theft deterrent system
W/o theft deterrent system

Pass-Key Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Pass-Key Wiring Diagram for Buick Lucerne CXS 2008:

Acc
Acc volt
Battery
Computer data lines system
G300 (under driver's seat)
Ground
Hot at all times
Ign
Ignition switch
Instrument panel cluster (ipc)
J201
J204
Logic
Low spd gmlan ser data
Off
Passkey fuse 13 10a
Power distribution system
Rear fuse block (below left side of rear seat)
Run
Security ind
Serial data
Start
Theft deterrent module (tdm) (in steering column)

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CXS 2008

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List of elements for Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CXS 2008:

12v reference
Acc wakeup serial data
Anti-lock brakes system
Backlight lamp control
Battery
Battery current sensor (below right side of rear seat)
Battery pos voltage
Bcm (chmsl) fuse 39 10a
Bcm (lttn) fuse 25 15a
Bcm (rttn) fuse 36 15a
Body control module (bcm) (right of glove box)
Computer data lines system
Cruise control system
Cruise ctr ind dimming sig
Door locks system
Drl relay ctrl
Exterior lights system
Fog lamp relay ctrl
Front fog lamp sw sig
G303 (below right side of rear seat)
G304 (under right front passenger's seat)
Ground
Headlamp high beam rly
Headlights system
Hi gmlan data bus (+)
Hi gmlan data bus (-)
Hi gmlan serial data up
Hood ajar switch sig
Hot at all times
Interior lights system
J206
Led dimming signal
Left lamp relay ctrl
Low gmlan serial data
Low reference
Out moisture sns sig 1
Out moisture sns sig 2
Pnk
Power distribution system
R lamp relay ctrl
Rear fuse block (below left side of rear seat)
Rf turn sig lamp sply
Run/crank ign 1 volt
Tan
Tan/pnk
Washer relay ctrl
Wiper mtr park sw sig
Wiper/washer system
X2 d9
X3 e12

Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CXS 2008

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List of elements for Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CXS 2008:

12v reference
5v ref
Accessory volt
Ambient light sns sig
Anti-lock brakes system
Battery pos voltage
Body control module (bcm) (right of glove box)
Column radio ctrl signal
Courtesy lamp ctrl
Courtesy lamp sw on sig
Cruise control system
Exterior lights system
Flash to pass sw sig
Ground
Hazard sw sig
Headlamp sw hi beam sig
Headlamp sw off sig
Headlights system
Ignition 1 voltage
Interior lights system
Left turn sig sw sig
Off/run crank voltage
Park lamp sw on sig
Pnk
Power distribution system
Remote radio ctrl acc
Right turn sig sw sig
Set/coast resume/accel
Shift interlock system
Shift select sw park sig
Tan
Track control sw sig
Trunk release ctrl
Trunk, tailgate, fuel doors system
Washer sw sig
Wiper sw high sig
Wiper sw low sig
Wiper/washer system

Body Control Modules Wiring Diagram (3 of 3) for Buick Lucerne CXS 2008

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List of elements for Body Control Modules Wiring Diagram (3 of 3) for Buick Lucerne CXS 2008:

Backlight lamp control
Body control module (bcm) (right of glove box)
Computer data lines system
Courtesy lamp ctrl
Current sensor sig
Current sns sply volt
Door locks system
Exterior lights system
Headlights system
Hi speed relay ctrl
Hood closed sw sig
Horn relay ctrl
Horns system
Interior lights system
Lamp rly coil sply volt
Lf turn sig sply volt
Low beam relay ctrl
Low gmlan serial data
Lr door ajar sw sig
Lr door lock motor ctrl
Lr door open sw sig
Lr stop/turn lamp sply
Master sw lockout sig
Master sw lr down sig
Master sw lr up sig
Master sw rr down sig
Master sw rr lockout
Master sw rr up sig
Park brake switch (on top of park brake assembly)
Park brake switch sig
Park lamp relay control
Power distribution system
Power windows system
Rap relay coil sply volt
Rr door ajar sw sig
Rr door lock motor ctrl
Rr stop/turn lamp sply
Run relay coil ctrl
Sensor low reference
Starting/charging system
Stop lamp sw sig
Tan
Trunk ajar sw sig
Trunk release relay ctrl
Trunk, tailgate, fuel doors system
Wiper relay control
Wiper/washer system

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008

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List of elements for Computer Data Lines Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008:

(if equipped) right side object sensor
(in engine harness, approximately 13 cm (5 in) from breakout for x138) j104
(left front of engine compartment, inside air cleaner housing)
(left rear of engine compartment)
(under center console) inflatable restraint sensing & diagnostic module (sdm)
3.8l
4.6l
A6 x3
Acc wake up data
Automatic level control module (w/ soft ride suspension system) (forward of left rear tire, on lower control arm) electronic suspension control (esc) module (w/ magnetic ride control) (behind right wheelwell)
D (not used)
Digital radio receiver (drr) (w/ digital audio system s-band) (at left "d" pillar)
Electronic brake control module (ebcm) (left front corner of engine compt)
Engine control module (ecm) (left side of engine compt)
F (not used)
G (not used)
Hi spd serial data +
Hi spd serial data -
J (not used)
Jx300 (in passenger compt under rear seat near rear fuse block)
Left side object sensor
Low spd serial data
Powertrain control module (pcm)
Rear object sensor control module (w/ parking assist)
Remote control door lock receiver (rcdlr) (under center of rear package shelf)
Serial data wake up
Tan
Transmission control module (tcm)
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle communication interface module (vcim) (w/ onstar) (on right front of trunk, attached to seat back brace)
Vehicle direction alert alarm warning module (w/ lane departure warning sensor indicator)
W/ magnetic ride control
W/ soft ride suspension system
X2 a2

Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008:

(in i/p harness, approximately 12 cm (5 in) from data link connector) j208
Body control module (bcm) (right of glove box)
C10 tan
Climate control seat module
Data link connector (dlc) (under left side of dash)
Driver door module (ddm)
Front passenger door module (fpdm)
G300 (under driver's seat)
Hi spd serial data +
Hi spd serial data -
Hot at all times
Hvac control module
Inflatable restraint passenger presence system (pps) module (under front passenger's seat)
Instrument panel cluster (ipc)
J200
J202
J203
J207 (in i/p harness, approximately 17 cm (7 in) from data link connector)
Kw 2000 serial data
Low spd serial data
Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame)
Passkey fuse 13 10a
Radio
Rear fuse block (below left side of rear seat)
Run/acc
Serial data wake up
Tan
Theft deterrent module (tdm) (in steering column)

COOLING FAN

Cooling Fan Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Cooling Fan Wiring Diagram for Buick Lucerne CXS 2008:

(or tan)
3.8l
4.6l
87a
Computer data lines system
Ect sens sig
Engine coolant temperature (ect) sensor (3.8l: left rear of engine) (4.6l: right rear of engine)
Fan 1 fuse 27 30a
Fan 1 relay
Fan 2 fuse 26 30a
Fan 2 relay
Fan 3 relay
G104 (right front corner of engine compt)
Gmlan serial data +
Gmlan serial data -
Hi speed rly ctrl
Hot at all times
Hot w/ pwr/ trn relay energized
Left cooling fan (on left rear side of radiator)
Low ref
Low speed rly ctrl
Oxy snsr fuse 6 15a
Pnk
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt)
Right cooling fan (on right rear side of radiator)
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

CRUISE CONTROL

Cruise Control Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Cruise Control Wiring Diagram for Buick Lucerne CXS 2008:

(in steering column harness, between cruise control on/off switch & inflatable restraint steering wheel module coil)
(lower left rear of engine) g112
5 v ref
5v ref
5v ref 2
Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
App sns 1 sig
App sns 2 sig
App sns sig
B2 x2
Batt pos volt
Bcm (lttn) fuse 25 15a
Body control module (bcm) (right of glove box)
Brake pedal position sensor (top of brake pedal assembly)
Cancel
Computer data lines system
Cruise ind
D4 x1
D9 x2
Driver information center (dic)
Ecm/ tcm fuse 5 15a
Electronic suspension system
Engine control module (ecm) (4.6l) (left side of engine compt)
Gmlan (ecm)
Gmlan serial data
Hot at all times
Hot w/ ign 1 relay 36 energized
Hvac/ ipc ign 1 fuse 10 10a
Ign
Ign 1 vol
Ind dimming sig
Inflatable restraint steering wheel module coil (top of steering column)
Instrument panel cluster (ipc)
J100
J105
J220
Left steering wheel control switch
Logic
Low ref
Nca
On ind
Oss high sig
Oss low sig
Pnk
Pnk/red
Power distribution system
Powertrain control module (pcm) (3.8l) (left front of engine compt, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Res +
Res/acc sw sig
Sens sig
Ser data prim
Ser data sec
Serial data +
Serial data -
Serial data bus +
Serial data bus -
Serial data wake up
Set -
Sig gnd
Sound systems
Tac mtr ctrl 1
Tac mtr ctrl 2
Tan
Throttle actuator control (tac) module (on throttle body assembly)
Throttle body assembly
Tp sns 1 sig
Tp sns 2 sig
Transmission control module (tcm) (4.6l) (left rear of engine compt)
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle speed sensor (vss) (in lower right rear of engine compt, on transaxle)
Vehicle speed sensor (vss) (in transmission)
Vss
Vss hi sig
Vss lo sig
X276
X277

DEFOGGERS

Defoggers Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Defoggers Wiring Diagram for Buick Lucerne CXS 2008:

Computer data lines system
Driver door module (ddm)
Driver outside rearview mirror (in driver's door)
Front passenger door module (fpdm)
Front passenger outside rearview mirror (in front passenger's door)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
G307 (at right "c" pillar)
Ground
Heated mirror element
Hot at all times
Hvac control module
J385
Logic
Low reference
Low spd gmlan serial data
Nca
Rear defog rly ctrl
Rear defogger switch
Rear fuse block (below left side of rear seat)
Rear window defogger
Rr defog fuse 46 40a
Rr defog relay 52
Sply voltage
Tan/pnk

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Electronic Power Steering Wiring Diagram for Buick Lucerne CXS 2008:

5v ref
Abs fuse 23 50a
Abs mtr fuse 25 60a
Battery
Computer data lines system
Electronic brake control module (ebcm) (left front corner of engine compt)
G114 (lower left rear of engine)
Ground
High effort ctrl
Hot at all times
Low effort ctrl
Low ref
Pos sig a
Pos sig b
Red
Serial data (+)
Serial data (-)
Steering angle sensor (3.8l & 4.6l) (base of steering column)
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)
Variable effort steering actuator (left rear of engine compt)

ELECTRONIC SUSPENSION

Electronic Damper Control Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Electronic Damper Control Wiring Diagram for Buick Lucerne CXS 2008:

(in body harness, approximately 60 cm (24 in) from left front strut actuator)
(in body harness, approximately 65 cm (25 in) from righ front strut actuator)
(right front wall of luggage compt) g403
Automatic level control (alc) compressor (rear underside of vehicle)
Batt
Battery voltage
C10 nca
Comp relay fuse 24 10a
Computer data lines system
Driver information center (dic)
Electronic suspension control (esc) module (behind right wheelwell)
G403 (right front wall of luggage compt)
Gmlan ser data +
Gmlan ser data -
Ground
Hot at all times
Instrument panel cluster (ipc)
Ipc class 2
J127 (in body harness, approximately 65 cm (25 in) from left front strut actuator)
J128 (in body harness, approximately 60 cm (24 in) from right front strut tan actuator)
J200
Left front suspension damper (on left front shock absorber assembly)
Left front suspension position sensor (on shock absorber assembly)
Left rear suspension damper (on left rear shock absorber assembly)
Left rear suspension position sensor (on left rear frame rail)
Level comp fuse 47 40a
Level comp relay
Lf damper ctrl
Lf damper low ref
Lf position sens
Lf snsr low ref
Lf voltage ref
Logic
Lr damper ctrl
Lr damper low ref
Lr position sens
Lr snsr low ref
Lr voltage ref
Mdl-rtd fuse 15 25a
Message request
Nca
Passkey fuse 13 10a
Rear fuse block (below left side of rear seat)
Relay ctrl
Rf damper ctrl
Rf damper low ref
Rf position sens
Rf snsr low ref
Rf voltage ref
Right front suspension damper (on right front shock absorber assembly)
Right front suspension position sensor (on shock absorber assembly)
Right rear suspension damper (on right rear shock absorber assembly)
Right rear suspension position sensor (on right rear frame rail)
Rr damper ctrl
Rr damper low ref
Rr position sens
Rr snsr low ref
Rr voltage ref
Serial data
Solenoid ctrl
Tan

Electronic Level Control Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Electronic Level Control Wiring Diagram for Buick Lucerne CXS 2008:

(forward of left rear tire, on lower control arm)
(left rear of luggage compt) g402
(right front wall of luggage compt) g403
10a
Automatic level control (alc) compressor (rear underside of vehicle)
Automatic level control module
Batt
Batt positive
Comp relay fuse 24 10a
Computer data lines system
Driver information center (dic)
Gnd
Hot at all times
Instrument panel cluster (ipc)
Ipc class 2
J200
J388
Level comp fuse 47 40a
Level comp relay 53
Logic
Message request
Passkey fuse 13
Rear fuse block (below left side of rear seat)
Relay ctrl
Serial data
Serial data +
Serial data -
Solenoid ctrl
Tan

ENGINE PERFORMANCE

3.8L VIN 2

3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008:

(1 in) from branch for x139)
(in engine harness, approximately 3 cm
(left side of oil pan) engine oil level (eol) switch
(lower left rear of engine)
(on top front of engine) manifold absolute pressure (map) sensor
(on top right rear of engine) exhaust gas recirculation (egr) valve
(pins 62-72 not used)
5 volt ref 1
5 volt ref 2
Camshaft sig
Ect sensor sig
Egr pos sig
Egr sol high
Egr sol low
Engine coolant temperature (ect) sensor (left rear of engine)
Engine oil pressure (eop) switch (near oil filter)
Evap purge sol
Evaporative emission (evap) canister purge solenoid valve (on top right rear of engine)
Fuel inj 1 ctrl
Fuel inj 2 ctrl
Fuel inj 3 ctrl
Fuel inj 4 ctrl
Fuel inj 5 ctrl
Fuel inj 6 ctrl
Fuel injectors (1, 3 & 5: top left side of engine) (2, 4 & 6: top right side of engine)
G112
G112 (lower left rear of engine)
Gen field
Gen on sig
Heated oxygen sensor (ho2s) 1 (on right exhaust manifold)
Ho2s heater 1
Ho2s low ref
Ho2s ref volt
Ic timing ctrl
Ic timing sig
J109
Knock sensor (ks) 1 (on left side of engine, near starter)
Knock sensor (ks) 2 (on right side of engine, below exhaust manifold)
Knock sensor 1
Knock sensor 2
Low eng speed
Low ref
Map sensor sig
Med eng speed
Nca
Oil level sw
Oil press sig
Pnk
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Relay control
Signal ground
Starting/charging system
Tan
Tan/pnk
Uart data

3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008:

(lower left rear of engine)
(not used)
(on left front of engine, next to crankshaft balancer) crankshaft position (ckp) sensor
(on right front of engine compt, forward of strut tower) underhood fuse block
(on right front of engine) camshaft position (cmp) sensor
12-volt ref
5 volt ref
Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
App sensor 1
App sensor 2
Body control module (bcm) (right of glove box)
Ckp sen 1 sig
Ckp sen 2 sig
Cmp sens sig
Cmp sig
Firing order 1-6-5-4-3-2
From ecm/ pcm (fuse 9) (diagram 4 of 5)
From emis dev (fuse 7) (diagram 4 of 5)
Fuel inj even fuse 3 15a
Fuel inj odd fuse 2 15a
G112
G115 (lower left rear of engine)
Gnd
Ground
Hall effect sensor
Ic timing ctrl
Ic timing sig
Ign 1 volt
Ignition coils
Ignition control module (icm) (at left front of engine, under ignition coils)
J145
J164
Low ref
Low speed sig
Medium speed sig
Nca
P pnk
Pnk
Primary uart
Sec uart
Spark plugs
Stop lamp
Stop lamp switch signal
Throttle actuator control (tac) module (on throttle body assembly)
Trans/ ign 1 fuse 8 10a
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle spd
Volt ign 1
X110

3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008:

(not used)
1-2 shift solenoid valve
2-3 shift solenoid (ss) valve
A red
A/t fluid temperature (tft) sensor valve
A/t input shaft speed (iss) sensor
At iss low sig
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Code a
Code b
Code c
G112 (lower left rear of engine)
Ho2s 2 sig high
Ho2s 2 sig low
Ho2s heater 2
Iat sensor sig
Interlock system
J115
Lockout sol ctrl
Low ref
Maf sensor sig
P/n
Parity
Pc sol hi ctrl
Pnk
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Pre sen sig
Pressure control (pc) solenoid valve
Red
Shift
Shift sol
Sol low ctrl
Tan
Tan/pnk
Tcc release switch
Tcc sol
Tcc sw sig
Tft sensor sig
Torque converter clutch solenoid valve
Tr sig a
Tr sig b
Tr sig c
Tr sig p
Transmission internal mode switch (ims)
Vehicle speed sensor (vss) (in transmission)
Vss sig high
Vss sig low

3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008:

(lower left rear of engine) g112
(lower left rear of engine) g114
(under vehicle, after catalytic converter)
Air pump fuse 22 50a
Air pump relay
Air sol fuse 5 15a
Air sol relay
Ecm/crnk fuse 1 15a
Ecm/pcm fuse 9 10a
Emis dev fuse 7 15a
G112 (lower left rear of engine)
Gnd
Heated oxygen sensor (ho2s) 2
Hot at all times
Hot in run or start
Ign relay 36
J101
J108
Mass air flow (maf)/intake air temperature (iat) sensor (left side of engine compartment, in air intake tube)
Nca
Oxy snsr fuse 6 15a
Pnk
Pwr/trn relay
Red
Rly ctrl
Secondary air injection (air) check valve (w/ california pzev emission system)
Secondary air injection (air) pump (w/ california pzev emission system)
Sens sig maf
Strtr relay 30
Tan
Tan d
Tan/pnk
To fuel inj even (fuse 3) (diagram 2 of 5)
To trans/ ign 1 (fuse 8) (diagram 2 of 5)
Underhood fuse block (on right front of engine compt, forward of strut tower)

3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008:

(in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module) j316
(right front wall of luggage compartment) g403
(under left rear seat)
5 volt ref 1
A/c clutch relay
A/c press sig
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
Acc
Air conditioning system
Battery
Body control module (bcm) (right of glove box)
Computer data lines system
Cooling fans system
Driver information center (dic)
Ecm/tcm fuse 5 15a
Evap vent sol
Evaporative emissions (evap) canister vent solenoid valve (below rear of vehicle, on evap canister)
F/pmp fuse 1 20a
F10 x3
Fuel level sig
Fuel pump & sender assembly (top of fuel tank)
Fuel pump relay
Fuel pump relay 57
Fuel tank press
Fuel tank pressure (ftp) sensor (on top of fuel tank)
G300 (under driver's seat)
G301
Gnd
High fan
Hot at all times
Ign
Ignition 1
Ignition switch
Instrument panel cluster (ipc)
J201
J203
Logic
Low fan
Low ref
Malfunction indicator lamp (mil)
Mil control
Off
Pnk
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Relay control
Relay ctrl
Run
Ser data bus +
Ser data bus -
Sol can fuse 34 10a
Start
Starter enable
Starting/charging system
Stop lamp sw
Tan
Vehicle speed sig
Wakeup data

4.6L VIN 9

4.6L VIN 9, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008:

(left rear of engine compartment) transmission control module (tcm)
(lower left rear of engine) g112
(right of glove box) body control module (bcm)
(under driver's seat) g300
5v ref 1
5v ref 2
A/c com clutch rly
Accelerator pedal position (app) sensor (top of accelerator pedal assembly) pedal assembly)
Accessory wake up
Air conditioning system
App sensor 1 sig
App sensor 2 sig
Battery pos volt
Cooling fans system
Ecm/ pcm fuse 10a
Ecm/crnk fuse 1 15a
Engine control module (ecm) (left side of engine compartment)
Engine oil pressure (eop) switch (near oil filter)
Evap canister vent
Exterior lights system
Fan relay ctrl
Fuel pump rly ctrl
Fuel tank pressure (ftp) sensor (on top of fuel tank)
G112 (lower left rear of engine)
Gnd
Hot at all times
Ign
Ign relay
Ignition 1 voltage
Instrument panel cluster (ipc)
J104 (in engine harness, approximately 13 cm (5 in) from breakout to x138)
J105
J203
Logic
Low reference
Malfunction indicator lamp (mil)
Mil control
Oss hi sig
Oss low sig
Oxy snsr fuse 6 15a
Pnk
Pressure sns sig
Primary fuel level
Pwr/train relay
Pwr/trn relay
Rly ctrl
Serial data acc wake up
Starter rly coil
Starting/ charging system
Stop lamp sw sig
Tan
To fuse pwr emis dev fuse 7 (diagram 4 of 5)
Underhood fuse block (on right front of engine compartment, forward of strut tower)
Vehicle speed sensor (vss) (in transmission)

4.6L VIN 9, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008:

(below rear of vehicle, on evap canister) evaporative emission (evap) canister vent solenoid valve
(near a/c compressor, on hose assembly)
(top of fuel tank) fuel pump & sender assembly
(under left rear seat)
5v ref 1
5v ref 2
A/c refrigerant pressure sensor
Acc
Air pump relay ctrl
Cooling fans system
Ctrl bank 2 sns 1
Ecm/tcm fuse 5 15a
Engine control module (ecm) (left side of engine compartment)
Evap canister purge
F/pmp fuse 1 20a
F10
Field duty cycle sig
Fuel pump relay
G301
G403 (right front wall of luggage compartment)
Hot at all times
Ignition switch
J100
J201
J316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
Low reference
Low speed cooling
Off
Park/neutral
Pnk
Rear fuse block (below left side of rear seat)
Ref bank 2 sns 1
Reverse lockout sol
Run
Serial data bus -
Shift interlock system
Sol can fuse 10a
Start
Starting/ charging system
Tan
Transmissions system
Turn on signal
Volt bank 2 sns 1

4.6L VIN 9, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008:

(lower left front of engine compartment) secondary air injection (air) pump
(lower left rear of engine)
(on top right rear of engine) evaporative emission (evap) canister purge solenoid valve
(top center of rear camshaft cover) secondary air injection (air) check valve
Air pump fuse 50a
Air pump relay
Air sol fuse 5 15a
Air sol relay
Computer data lines system
Ect sensor sig
Engine control module (ecm) (left side of engine compartment)
Engine coolant temperature (ect) sensor (right rear of engine)
G115
Heated oxygen sensor (ho2s) bank 2 sensor 1 (in left exhaust manifold)
Hot at all times
Hot in run or start
Ignition coil/module 2 (top left side of engine)
J106
Manifold absolute pressure (map) sensor (on top rear of engine)
Map sensor sig
Nca
Oil pre sw signal
Pnk
Pre sns sig
Refrig pre sen sig
Serial data bus +
Spark plug
Tan
Underhood fuse block (on right front of engine compartment, forward of strut tower)

4.6L VIN 9, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008:

(below exhaust gas recirculation (egr) valve)
(in engine harness, approximately 3 cm (1 in) from branch for x139) j109
(in engine harness, approximately 6 cm (2 in) from branch for engine coolant temperature (ect) sensor)
(in engine harness, approximately 7 cm (4 in) from branch for x139 toward breakout for x138) j102
(in even bank ignition coil harness, between x139 & ignition coil/ module 8) j131
(in even bank ignition coil harness, between x139 & ignition coil/module 8)
(in even bank ignition coil harness, pnk between x139 & ignition coil/ module 2) j133
(in odd bank ignition coil harness, between x140 & ignition coil/module 7) j142
(on top right rear of engine) exhaust gas recirculation (egr) valve
Emis dev fuse 7 15a
From ecm/crnk fuse 1 (diagram 1 of 5)
Fuel inj even fuse 3 15a
Fuel inj odd fuse 2 15a x3
Fuel injectors (top left side of engine)
Fuel injectors (top right side of engine)
G100
Ignition coil/module (top left side of engine)
Ignition coil/module (top right side of engine)
J110
J135
J144
J146 (in odd bank ignition coil harness, between x140 & ignition coil/module 7)
Nca
Plug spark
Pnk
Pnk/tan
Red
Spark plug
Tan
Underhood fuse block (on right front of engine compartment, forward of strut tower)

4.6L VIN 9, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008:

(left side of engine compartment, in air intake tube)
5v ref 1
5v ref 2
Camshaft position (cmp) sensor (on right front of engine)
Ckp sensor sig
Cmp sensor sig
Crankshaft position (ckp) sensor (top center of engine)
Egr sol high ctrl
Egr sol low ctrl
Egr valve pos sig
Engine control module (ecm) (left side of engine compartment)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
G112 (lower left rear of engine)
Heated oxygen sensor (ho2s) 2 (in exhaust, after catalytic converter)
Heated oxygen sensor (ho2s) bank 1 sensor 1 (on right exhaust manifold)
Heater low ctrl
Ho2s 2 high sig
Ho2s 2 low sig
Iat sensor sig
Ic 1 control
Ic 2 ctrl
Ic 3 control
Ic 4 control
Ic 5 ctrl
Ic 6 ctrl
Ic 7 ctrl
Ic 8 control
Ignition 1 voltage
J105
Knock sensor (ks) 1 (top right side of engine)
Knock sensor (ks) 2 (top left side of engine)
Knock sns 1 sig
Knock sns 2 sig
Low ref
Low reference
Maf sensor sig
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Pnk
Pnk/red
Pnk/tan
Ref bank 1 sen 1
Signal ground
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Tan/pnk
Throttle body assembly
Tp sensor 1 sig
Tp sensor 2 sig
Volt bank 1 sns 1

4.6L VIN Y

4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008:

(left rear of engine compartment) transmission control module (tcm)
(lower left rear of engine) g112
(right of glove box) body control module (bcm)
(under driver's seat) g300
5v ref 1
5v ref 2
A/c com clutch rly
Accelerator pedal position (app) sensor (top of accelerator pedal assembly) pedal assembly)
Accessory wake up
Air conditioning system
App sensor 1 sig
App sensor 2 sig
Battery pos volt
Cooling fans system
Ecm/ pcm fuse 10a
Ecm/crnk fuse 1 15a
Engine control module (ecm) (left side of engine compartment)
Engine oil pressure (eop) switch (near oil filter)
Evap canister vent
Exterior lights system
Fan relay ctrl
Fuel pump rly ctrl
Fuel tank pressure (ftp) sensor (on top of fuel tank)
G112 (lower left rear of engine)
Gnd
Hot at all times
Ign
Ign relay
Ignition 1 voltage
Instrument panel cluster (ipc)
J104 (in engine harness, approximately 13 cm (5 in) from breakout to x138)
J105
J203
Logic
Low reference
Malfunction indicator lamp (mil)
Mil control
Oss hi sig
Oss low sig
Oxy snsr fuse 6 15a
Pnk
Pressure sns sig
Primary fuel level
Pwr/train relay
Pwr/trn relay
Rly ctrl
Serial data acc wake up
Starter rly coil
Starting/ charging system
Stop lamp sw sig
Tan
To fuse pwr emis dev fuse 7 (diagram 4 of 5)
Underhood fuse block (on right front of engine compartment, forward of strut tower)
Vehicle speed sensor (vss) (in transmission)

4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008:

(below rear of vehicle, on evap canister) evaporative emission (evap) canister vent solenoid valve
(near a/c compressor, on hose assembly)
(top of fuel tank) fuel pump & sender assembly
(under left rear seat)
5v ref 1
5v ref 2
A/c refrigerant pressure sensor
Acc
Air pump relay ctrl
Cooling fans system
Ctrl bank 2 sns 1
Ecm/tcm fuse 5 15a
Engine control module (ecm) (left side of engine compartment)
Evap canister purge
F/pmp fuse 1 20a
F10
Field duty cycle sig
Fuel pump relay
G301
G403 (right front wall of luggage compartment)
Hot at all times
Ignition switch
J100
J201
J316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
Low reference
Low speed cooling
Off
Park/neutral
Pnk
Rear fuse block (below left side of rear seat)
Ref bank 2 sns 1
Reverse lockout sol
Run
Serial data bus -
Shift interlock system
Sol can fuse 10a
Start
Starting/ charging system
Tan
Transmissions system
Turn on signal
Volt bank 2 sns 1

4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008:

(lower left front of engine compartment) secondary air injection (air) pump
(lower left rear of engine)
(on top right rear of engine) evaporative emission (evap) canister purge solenoid valve
(top center of rear camshaft cover) secondary air injection (air) check valve
Air pump fuse 50a
Air pump relay
Air sol fuse 5 15a
Air sol relay
Computer data lines system
Ect sensor sig
Engine control module (ecm) (left side of engine compartment)
Engine coolant temperature (ect) sensor (right rear of engine)
G115
Heated oxygen sensor (ho2s) bank 2 sensor 1 (in left exhaust manifold)
Hot at all times
Hot in run or start
Ignition coil/module 2 (top left side of engine)
J106
Manifold absolute pressure (map) sensor (on top rear of engine)
Map sensor sig
Nca
Oil pre sw signal
Pnk
Pre sns sig
Refrig pre sen sig
Serial data bus +
Spark plug
Tan
Underhood fuse block (on right front of engine compartment, forward of strut tower)

4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008:

(below exhaust gas recirculation (egr) valve)
(in engine harness, approximately 3 cm (1 in) from branch for x139) j109
(in engine harness, approximately 6 cm (2 in) from branch for engine coolant temperature (ect) sensor)
(in engine harness, approximately 7 cm (4 in) from branch for x139 toward breakout for x138) j102
(in even bank ignition coil harness, between x139 & ignition coil/ module 8) j131
(in even bank ignition coil harness, between x139 & ignition coil/module 8)
(in even bank ignition coil harness, pnk between x139 & ignition coil/ module 2) j133
(in odd bank ignition coil harness, between x140 & ignition coil/module 7) j142
(on top right rear of engine) exhaust gas recirculation (egr) valve
Emis dev fuse 7 15a
From ecm/crnk fuse 1 (diagram 1 of 5)
Fuel inj even fuse 3 15a
Fuel inj odd fuse 2 15a x3
Fuel injectors (top left side of engine)
Fuel injectors (top right side of engine)
G100
Ignition coil/module (top left side of engine)
Ignition coil/module (top right side of engine)
J110
J135
J144
J146 (in odd bank ignition coil harness, between x140 & ignition coil/module 7)
Nca
Plug spark
Pnk
Pnk/tan
Red
Spark plug
Tan
Underhood fuse block (on right front of engine compartment, forward of strut tower)

4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008:

(left side of engine compartment, in air intake tube)
5v ref 1
5v ref 2
Camshaft position (cmp) sensor (on right front of engine)
Ckp sensor sig
Cmp sensor sig
Crankshaft position (ckp) sensor (top center of engine)
Egr sol high ctrl
Egr sol low ctrl
Egr valve pos sig
Engine control module (ecm) (left side of engine compartment)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
G112 (lower left rear of engine)
Heated oxygen sensor (ho2s) 2 (in exhaust, after catalytic converter)
Heated oxygen sensor (ho2s) bank 1 sensor 1 (on right exhaust manifold)
Heater low ctrl
Ho2s 2 high sig
Ho2s 2 low sig
Iat sensor sig
Ic 1 control
Ic 2 ctrl
Ic 3 control
Ic 4 control
Ic 5 ctrl
Ic 6 ctrl
Ic 7 ctrl
Ic 8 control
Ignition 1 voltage
J105
Knock sensor (ks) 1 (top right side of engine)
Knock sensor (ks) 2 (top left side of engine)
Knock sns 1 sig
Knock sns 2 sig
Low ref
Low reference
Maf sensor sig
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Pnk
Pnk/red
Pnk/tan
Ref bank 1 sen 1
Signal ground
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Tan/pnk
Throttle body assembly
Tp sensor 1 sig
Tp sensor 2 sig
Volt bank 1 sns 1

EXTERIOR LIGHTS

Exterior Lamps Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008

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List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008:

3.8l
4.6l
Auto
Backup lamp circuit
Batt pos volt
Body control module (bcm) (right of glove box)
Center high mounted stop lamp (chmsl)
Chmsl sply volt
Driver outside rear view mirror (in driver's door)
Engine control module (ecm) (left side of engine compt)
Front passenger outside rear view mirror (in front passenger's door)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G403 (right front wall of luggage compt)
Hazard sw sig
Hazard switch
Head
Headlamp switch
Hot at all times
If equipped
Interior lights system
J202
J204
J206
Left corn lmp rly ctrl
Left tail lamp
Left turn
Left turn sw sig
Lf crn lamp fuse 20 10a
Lf turn
Lf turn sig lmp sply
Logic
Lr stop/turn lmp sply
Off
Park
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Prk lmp rly ctrl
Prk lmp sw on sig
Rf crn lamp fuse 21 10a
Rf turn
Rf turn sig lmp sply
Right backup lamp
Right corn lmp rly ctrl
Right tail lamp
Right turn
Right turn sw sig
Rr stop/turn lmp sply
Sig lmp x1 sply volt
Stop lmp sw sig
Tan
Tan/pnk
Throttle actuator control (tac) module (on throttle body assembly)
Transmission control module (tcm) (left rear of engine compt)
Trn/sig pcb relay
Turn signal/ multifunction switch
Underhood fuse block (on right front of engine compt, forward of strut tower)
Underhood fuse block (on right front of engine compt, forward of strut tower) x3

Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008:

B11
Bcm (chmsl) fuse 39 10a
Bcm (ctsy) fuse 35 10a
Bcm (lttn) fuse 25 15a
Bcm (rttn) fuse 36 15a
E12
G104 (right front corner of engine compt)
G402 (left rear of luggage compt)
G403 (right front wall of luggage compt)
Hot at all times
J323 (in body harness, approximately 15 cm (6 in) from branch for rear fuse block)
J324 (in body harness, approximately 5 cm (2 in) from breakout for right inflatable restraint roof rail module)
J326
J402
J404 (in rear fascia harness, approximately 13 cm (5 in) from breakout for license lamps)
Left front cornering lamp
Left front headlamp assembly
Left front marker lamp
Left license lamp
Left park/ turn signal lamp
Left rear marker lamp
Left tail lamp assembly
Left tail/stop & turn signal lamp
Park lp-lt fuse 2 10a
Park lp-lt fuse 4 10a
Park lp-lt relay 58
Rear fuse block (below left side of rear seat)
Right front cornering lamp
Right front headlamp assembly
Right front marker lamp
Right license lamp
Right park/ turn signal lamp
Right rear marker lamp
Right tail lamp assembly
Right tail/stop & turn signal lamp
Tan
Tan/pnk
Trailer stop/turn
Underhood fuse block (on right front of engine compt, forward of strut tower)

3.8L VIN 2

3.8L VIN 2, Backup Lamps Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for 3.8L VIN 2, Backup Lamps Wiring Diagram for Buick Lucerne CXS 2008:

(lower left rear of engine) g112
Automatic transmission
Backup
Backup lmp sply
Batt pos volt
Bcm (chmsl) fuse 39 10a
Body control module (bcm) (right of glove box)
Bus +
Bus -
Code a
Code b
Computer data lines system
G403 (right front wall of luggage compt)
Hot at all times
Inside rear view mirror
J325 (in body harness, approximately 7 cm (3 in) from breakout for battery current sensor)
Left backup lamp
Left tail lamp
Lmp sply volt
Logic
Powertrain control module (left front of engine compt, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Right backup lamp
Right tail lamp
Sig a
Sig b
Tan
Transmission internal mode switch
X2 e12

4.6L VIN Y

4.6L VIN Y, Backup Lamps Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN Y, Backup Lamps Wiring Diagram for Buick Lucerne CXS 2008:

(in body harness, approximately 7 cm (3 in) from breakout for battery current sensor) j325
(lower left rear of engine) g112
Automatic transmission
Backup
Backup lmp sply
Batt pos volt
Bcm (chmsl) fuse 39 10a
Body control module (bcm) (right of glove box)
Bus +
Bus -
Computer data lines system
E12 x2
G403 (right front wall of luggage compt)
Hot at all times
Inside rear view mirror
J105
Left backup lamp
Left tail lamp
Lmp sply volt
Logic
Nca
Rear fuse block (below left side of rear seat)
Right backup lamp
Right tail lamp
Sig a
Sig b
Tan
Transmission control module (left rear of engine compt)
Transmission internal mode switch

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for Buick Lucerne CXS 2008

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List of elements for Ground Distribution Wiring Diagram (1 of 4) for Buick Lucerne CXS 2008:

(3.8l) ignition control module (icm)
(4.6l) a/c compressor clutch
(4.6l) secondary air injection (air) pump
(if equipped) sunroof control module
(on right front of engine compartment, forward of strut tower) underhood fuse block
(w/ magnetic ride control) electronic suspension control (esc) module
(w/ side obstacle detection sensor indicator) left side object sensor
(w/ side obstacle detection sensor indicator) right side object sensor
14 cm (6 in) from branch for throttle body assembly)
3.8l & pzev
A x2
Air pump relay
Automatic level control (alc) compressor
Automatic transmission
Battery
Battery current sensor
Body control module (bcm)
Electronic brake control module (ebcm)
Engine control module (ecm)
Engine oil pressure (eop) switch
Fuel pump & sender assembly
G100 (4.6l) (below exhaust gas recirculation (egr) valve)
G101 (left front corner of engine compartment)
G112 (4.6l) (lower left rear of engine)
G114 (lower left rear of engine)
G115 (lower left rear of engine)
G303 (below right side of rear seat)
G306 (at left "c" pillar)
G307 (at right "c" pillar)
G403 (right front wall of luggage compartment)
Ign relay
Ignition coil/ module 1
Ignition coil/ module 2
Ignition coil/ module 3
Ignition coil/ module 4
Ignition coil/ module 5
Ignition coil/ module 6
Ignition coil/ module 7
Ignition coil/ module 8
J106 (in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly)
J108 (in engine harness, approximately 10 cm (4 in) from breakout for automatic transmission)
J133 (in even bank ignition coil harness, between x139 & ignition coil/module 2)
J144
J385 (in body harness, approximately 10 cm (4 in) from g306)
J402 (in rear fascia harness, approximately 7 cm (3 in) from breakout for license lamps)
Keyless entry antenna
Left license lamp
Left tail lamp
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Rear window defogger
Right license lamp
Right tail lamp
Right tail/ stop & turn signal lamp
Secondary air injection (air) pump
Solenoid
Strtr relay 30
Transmission control module (tcm)
Windshield wiper motor
Wpr hi pcb relay
X1 b
X2 e2
X3 c6

Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CXS 2008

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List of elements for Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CXS 2008:

(on right front of engine compartment, forward of strut tower) underhood fuse block
(pzev) secondary air injection (air) pump solenoid
(w/ remote keyless entry start/ extended range) hood ajar switch
12 cm (5 in) from breakout for x800)
A/c compressor clutch
Approximately 6 cm (2 in) from breakout for a/t shift lock control solenoid)
Automatic transmission
Automatic transmission shifter lever
Blower motor control module
Body control module (bcm)
C x1
Center console accessory power outlet
Cigar lighter
D x2
Engine oil level (eol) switch
Engine oil pressure (eop) switch
Fan 3 relay 32
For i/p compartment lamp)
Front passenger door module (fpdm)
G104 (right front corner of engine compartment)
G112 (3.8l) (lower left rear of engine)
G302 (under right front passenger's seat)
G304 (under right front passenger's seat)
Headlamp switch
Horn assembly
I/p compartment lamp
Ign relay
Inflatable restraint sensing & diagnostic module (sdm)
J383 (in center console harness, between breakout for a/t shift lock control solenoid & breakout for auxiliary hvac control module)
J387
Left front fog lamp
Left headlamp
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Powertrain control module (pcm)
Right engine cooling fan
Right front door courtesy lamp
Right front fog lamp
Right headlamp
Right rear door latch
Right rear door window switch
Throttle actuator control (tac) module
To passenger seat adjuster switch (diagram 3 of 4)
Traction control switch
W/ custom bucket seat
Windshield washer fluid level switch
Windshield washer fluid pump
Windshield washer solvent heater
Wpr pcb relay

Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CXS 2008

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List of elements for Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CXS 2008:

(w/ front cooling seat heater) seat climate control module
(w/ memory seat adjuster) memory seat module (msm)
(w/o custom bucket seat) traction control switch
Ambient light sensor
Approximately 8 cm (4 in) from breakout for inflatable restraint seat position sensor)
Ashtray lamp
Brake fluid level switch
Cigar lighter
Data link connector (dlc)
Driver door module (ddm)
Driver information display switch
Driver seat adjuster switch
From splice j387 (diagram 2 of 4)
Front accessory power outlet
G300 (under driver's seat)
Hazard switch
Heated steering wheel control module
Horn switch
Hvac control module
Ignition lock cylinder control solenoid
Inflatable restraint passenger presence system (pps) module
Inflatable restraint steering wheel module coil
Inside air tempe- rature sensor
Instrument panel cluster (ipc)
J203 (in i/p harness, approximately 36 cm (14 in) from breakout for hvac module)
J306 (in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat belt switch)
Left front door courtesy lamp
Left steering wheel control switch
Lighter)
Nca
Passenger seat adjuster switch
Passenger seat lumbar adjuster switch
Restraint steering wheel module coil)
Right steering wheel control switch
Sunload sensor
Theft deterrent module (tdm)
Turn signal/ multifunction switch
W/ 8-way passenger seat adjuster
W/ automatic, auxiliary temperature air conditioner
W/ electronic controls front air conditioner
W/ heated nozzles
W/o 8-way passenger seat adjuster
W/o custom bucket seat
X205 & turn signal/multifunction switch connector c4)
X276
X276 d
X277
X277 d

Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CXS 2008

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List of elements for Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CXS 2008:

(below left side of rear seat) rear fuse block
(if equipped) windshield outside moisture sensor
(w/ digital audio system s-band) digital radio receiver
(w/ lane departure warning) vehicle direction alert alarm warning module
(w/ onstar) vehicle communication interface module (vcim)
(w/ rear parking assist) rear object sensor control module
(w/ suspension system) automatic level control (alc) module
Audio amplifier
Center high mounted stop lamp (chmsl)
Fuel pump relay 59
G110 (ground strap to generator)
G111 (in engine compartment, ground strap to right frame rail)
G301 (under left rear seat)
G305 (under driver's seat)
G402 (left rear of luggage compartment)
Garage door opener transmitter
Inflatable restraint i/p module indicator
Inside rearview mirror
J312 (in headliner harness, approximately 10 cm (4 in) from branch for x321)
J313
J365 (in body harness, approximately 5 cm (2 in) from audio amplifier connector c1)
Left rear door latch
Left rear door window switch
Left sunshade
Left tail/stop & turn signal lamp
Lock relay 63
Radio
Rap-hc relay 70
Rear compartment lid latch
Remote control door lock receiver (rcdlr)
Right sunshade
Rr defog relay 52
Run relay 64
Sunroof switch
Trk rel relay 67
Unlock relay 62
W/ premium audio branded & amplifier

HEADLIGHTS

Headlights Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Headlights Wiring Diagram for Buick Lucerne CXS 2008:

(on top of park brake assembly) park brake switch
Body control module (bcm) (right of glove box)
C (not used)
C12
Class 2 serial data
Computer data lines system
Data serial
Drl fuse 16 15a
Drl relay 65
Drl rly ctrl
Exterior lights system
F10
Flash to pass sw sig
Fog lamp fuse 14 10a
Fog lamp pcb relay
Fog lamps ind
Front fog lamp switch
Frt fog lamp rly ctrl
Frt fog lamp sw sig
Ftp
G104 (right front corner of engine compt)
G300 (under driver's seat)
G304 (under right front passenger's seat)
Gmlan (bcm)
Head
Headlamp sw off sig
Headlamp sw on sig
Headlamp switch
High
High beam ind
High beam pcb relay
High beam rly ctrl
Highbeam signal
Hot at all times
Hvac control module
Ign
Instrument panel cluster (ipc)
J124 (in forward lamp harness, approximately 26 cm (11 in) from x114)
J203
J204
J206
Left front fog lamp
Left headlamp
Left high beam headlamp
Left low beam headlamp
Light sensor sig
Lo beam pcb relay
Logic
Low
Low beam rly ctrl
Lt hi beam fuse 16 10a
Lt lo beam fuse 17 20a
Off
Park auto
Park brk sw
Park lamp relay ctrl
Park lamp sw on sig
Pnk
Rear fuse block (below left side of rear seat)
Right front fog lamp
Right headlamp
Right high beam headlamp
Right low beam headlamp
Rt hi beam fuse 15 10a
Rt lo beam fuse 18 20a
Serial data
Sunload twilight sensor (w/ automatic a/c) (top center of dash) ambient light sensor (w/ manual a/c) (center of dash, in defroster deflector)
Turn signal/ multifunction switch
Underhood fuse block (on right front of engine compartment, forward of strut tower)
W/ automatic a/c
W/ manual a/c
Washer sw sig
Wiper/washer system

HORN

Horn Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Horn Wiring Diagram for Buick Lucerne CXS 2008:

(in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat adjuster switch toward x314) j322
(right front corner of engine compartment) g104
(under driver's seat) g300
Body control module (bcm) (right of glove box)
High note horn
Horn assembly (left front of engine compartment)
Horn fuse 12 15a
Horn pcb relay
Horn rly ctrl
Horn switch
Hot at all times
Inflatable restraint steering wheel module coil (top of steering column)
J219
Low note horn
Nca
Tan
Underhood fuse block (on right front of engine compartment, forward of strut tower)
X276
X277

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008:

Abs ind
Air bag ind
Audible alarm
B2 x2
Backlighting ctrl
Backlighting ind
Batt pos volt
Brake ind
Charging ind
Cruise ind
Driver information center (dic)
Drv info center select menu sw sig
Drv info center sw low ref
Drv info center sw sig
Engine controls system
Engine coolant temperature ind
Fog lamps ind
Fuel level gauge
G300 (under driver's seat)
Gmlan
Gmlan (bcm)
Gmlan (ebcm)
Gmlan (ecm)
Gmlan (sdm)
Gnd
Ground
High beam ind
Hot at all times
Hot w/ run/crnk relay energized
Hvac/ ipc ign1 fuse 10 10a
Ign
Ign 1 volt
Instrument panel cluster (ipc)
Interior lights system
Ipc
J200
J202
J203
Left turn ind
Logic
Low spd gmlan serial data
Low tire pressure ind
Low washer fluid ind ctrl
Malfunction ind
Off ind ctrl
Oil level ind
Pass air bag
Pass air bag on ind ctrl
Pass seat belt ind
Passkey fuse 13 10a
Pnk
Pnk/tan
Power distribution system
Rear fuse block (below left side of rear seat)
Right turn ind
Seat belt ind
Security ind
Speedometer (mph/km/h)
Tachometer
Tan
Temperature gauge
Trip reset sw sig
Trip/ odometer
Trip/odometer ctrl
Trip/reset
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vdc ind
Washer fluid heat ctrl sw volt
Wiper/washer system
X2 f5

Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008:

(or tan)
3.8l
4.6l
Body control module (bcm) (right of glove box)
Brake fluid level switch (on master cylinder reservoir)
Computer data lines system
Driver information display switch
Engine control module (ecm) (4.6l) powertrain control module (ecm) (3.8l) (4.6l: left side of engine compt) (3.8l: left front of engine compt, inside air cleaner housing)
Engine controls system
Engine oil level switch (left side of oil pan)
Engine oil pressure (eop) switch (near oil filter)
Fuel level sens sig
Fuel pump & sender assembly (top of fuel tank)
G112 (lower left rear of engine)
G300 (under driver's seat)
Gmlan serial data+
Gmlan serial data-
Interior lights system
J105 (4.6l)
J202
J316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
Logic
Low ref
Low spd gmlan serial data
Oil level sw sig
Oil press sw sig
Park brake sw sig
Park brake switch (on top of park brake assembly)
Persona- lization
Pnk
Set/ reset
Tan
Trip/ fuel
Vehicle information

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Courtesy Lamps Wiring Diagram for Buick Lucerne CXS 2008:

(in body harness, approximately 14 cm (6 in) from breakout for x325) j329
(in body harness, approximately 5 cm (2 in) from breakout for audio amplifier connector c1) j372
(left rear of luggage compartment)
(under right front passenger's seat)
12 volt ref
Batt pos volt
Bcm (ctsy) fuse 35 10a
Bcm (inadv) fuse 32 10a
Body control module (bcm) (right of glove box)
Computer data lines system
Court lamp ctrl
Courtesy lamp
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Front passenger door latch assembly (rear of front passenger's door)
Front passenger door module (fpdm)
G300 (under driver's seat)
G301 (under left rear seat)
G304
G304 (under right front passenger's seat)
G402
Hot at all times
I/p compartment lamp
J202
J206
J211 (in i/p harness, approximately 28 cm (11 in) from breakout for body control module connector)
J313
J328 (in headliner harness, approximately 20 cm (8 in) from branch for x321)
J331 (in ip harness, between body control module & front door courtesy lamps)
J343 (in body harness, approximately 9 cm (3 in) from branch for x314)
J700
J800
Left front door courtesy lamp
Left rear door latch assembly (rear of left rear door)
Left roof rail reading lamp
Left sunshade
Low ref
Low speed gmlan serial data
Lr door open sw sig
Off
Open sw sig
Rear compartment courtesy lamp
Rear compartment lid latch (center rear of luggage compt)
Rear fuse block (below left side of rear seat)
Right front door courtesy lamp
Right rear door latch assembly (rear of right rear door)
Right roof rail reading lamp
Right sunshade
Tan/ pnk
Tan/pnk
W/ theft deterrent system
W/o theft deterrent system
X2 b11

Instrument Illumination Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Instrument Illumination Wiring Diagram for Buick Lucerne CXS 2008:

(in i/p harness, approximately 21 cm (8 in) from branch for hazard lamp switch toward branch for hvac module) j212
(under
12 volt ref
Ashtray lamp
Auto park
Automatic air conditioning
Backlight lamp ctrl
Backlighting (8 bulbs)
Backlighting control
Batt pos volt
Bcm (dim) fuse 18 10a
Body control module (bcm) (right of glove box)
Court lamp sw on sig
D x2
Driver information display switch
Driver's seat)
E12
G300
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G305 (under driver's seat)
G402 (left rear of luggage compartment)
Garage door opener transmitter (in overhead console)
Hazard switch
Head
Headlamp switch
Hot at all times
Hvac control module
I/p dimming sig
Inflatable restraint steering wheel module coil (in steering wheel)
Inst panel lamp sply
Instrument panel cluster (ipc)
J202
J203
J206
J214 (in i/p harness, approximately 17 cm (6 in) from breakout for body control module connector)
J219
J221
J225 (inside of heated steering wheel)
J312
J313
J333 (in body harness, approximately 35 cm (14 in) from breakout for left inflatable restraint side impact sensor)
J383
J700
J800
Led dimming sig
Left rear window switch
Left steering wheel control switch
Lighter) x2
Logic
Manual air conditioning
Off
Park lamp sw on sig
Pnk
Radio
Rear fuse block (below left side of rear seat)
Reverse lockout solenoid (base of floor shifter assembly)
Right rear window switch
Right steering wheel control switch
Stg illum fuse 8 2a
Sunroof switch (if equipped)
Traction control switch
W/ custom seat
W/ individual seat
X276
X277

MEMORY SYSTEMS

Memory Seat Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008

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List of elements for Memory Seat Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008:

(4 in) from driver seat adjuster motor connector)
(in driver seat harness, approximately 10 cm
(in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat cushion ventilation heat & cool module) j358
(in right front seat harness, approximately 7 cm (3 in) from passenger seat cushion ventilation heat & cool module connector) j357
A3 x1
B12
Battery
Climate control seat module
Computer data lines system
Cool control
Driver seat back ventilation heat & cool module (right side of driver's seat back)
Driver seat cushion ventilation heat & cool module (under right side of driver's seat)
Front passenger seat back ventilation heat & cool module
Front passenger seat cushion ventilation heat & cool module
G304 (under right front passenger's seat)
Ground
Heat control
Heating element
Hot at all times
Hot w/ run relay 64 energized
Ign 3 vol
J302 (w/ custom seat)
J306
J355
J356 (in driver seat harness, approximately 9 cm (4 in) from driver seat cushion ventilation heat & cool module connector)
Lh mode sig
Low ref
Mdl-frt fuse 9 30a
Pnk
Rear fuse block (below left side of rear seat)
Rh mode sig
Run 2 fuse 10 10a
Sens low ref
Sens sig
Serial data
Speed ctrl
Sup volt
Tan
Tan/pnk
Thermistor

Memory Seat Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008

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List of elements for Memory Seat Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008:

Back cushion ind
Back cushion sig
Back cushion sw sig
Back mode ind
Back mode ind cntrl
Back mode sw sig
Battery pos volt
Computer data lines system
Cool ind cntrl
Cool seat switch
Cool sw sig
Cooled seat switch
Ddm fuse 22 15a
Driver door module (ddm)
Driver heated & cooled seat switch
Easy exit seat switch
Exit sig
Front passenger door module (fpdm)
Front passenger heated & cooled seat switch
Full seat heat switch
Gmlan serial data
Heated seat back ind
Heated seat cool ind
Heated seat cushion ind
Heated seat ind
High ind ctrl
High ref
High temp ind
Hot at all times
Lamp dimming
Low ind ctrl
Low ref
Low temp ind
Medium ind ctrl
Medium temp ind
Memory 1 switch
Memory 2 switch
Pdm fuse 29 15a
Pnk
Rear fuse block (below left side of rear seat)
Seat back heat switch
Tan
Tan/ red
Tan/red
X2 a12

Memory Seat Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008

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List of elements for Memory Seat Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008:

(in left front seat harness, approximately 14 cm (6 in) from breakout for driver seat adjuster motor) j351
(under driver's seat) g300
A x1
A11 x1
B x1
Battery pos volt
Down ctrl
Driver lumbar position sensors
Driver seat lumbar massage motor (in driver's seat back)
Driver seat recline motor (in driver's seat back)
Driver seat recline position sensor
Dw steering tilt mtr ctrl
For telescope mtr ctrl
Forward ctrl
Front ver mtr dn ctrl
Front ver mtr up ctrl
Ground
Horizontal motor
Horizontal sensor
Hot at all times
J305
J352 (in left front seat harness, approximately 7 cm (3 in) from breakout for inflatable restraint seat position sensor)
Lh back element ctrl
Lh back sens low ref
Lh cushion element ctrl
Lh tempt sens low ref
Low ref
Lumbar forward ctrl
Lumbar rearward ctrl
Mdl-mem fuse 6 10a
Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame)
Memory seat sw high sig
Pnk
Pnk a
Pwr seat circuit breaker 55 25a
Pwr t/t circuit breaker 57 25a
Rear fuse block (below left side of rear seat)
Rear ver mtr dn ctrl
Rear ver mtr up ctrl
Rearward ctrl
Recline forward ctrl
Recline rearward ctrl
Red
Red/ pnk
Red/pnk
Rev telescope mtr ctrl
Rh back sens low ref
Rh cushion element ctrl
Rh element ctrl
Rh tempt sens low ref
Tan
Tan/ red
Tan/red
Up ctrl
Up steering tilt mtr ctrl
Vertical motor
Vertical sensor
X2 d
X3 d5
X3 e8

Memory Seat Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008

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List of elements for Memory Seat Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008:

C x2
Driver seat adjuster motor assembly (below driver seat)
Driver seat front vertical motor
Driver seat front vertical position sensor
Driver seat horizontal motor
Driver seat horizontal position sensor
Driver seat rear vertical motor
Driver seat rear vertical position sensor
Heating element
J215
J216
J360 (in right front seat harness, between x314 & left front cushion heated seat element)
Left front back heated seat element
Left front cushion heated seat element
Pnk
Right front cushion heated seat element
Right front heated seat back element
Tan
Tan/red
Telescoping actuator (if equipped) (on steering column assembly)
Thermistor
Tilt actuator (if equipped) (on steering column)
X1 a

Memory Seat Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008

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List of elements for Memory Seat Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008:

(on steering column) (if equipped) tilt & telescope switch
5v ref
Computer data lines system
Down
Driver cushion tempt sens sig
Driver lumbar adjuster switch (if equipped)
Driver seat adjuster switch
Driver seat back tempt sens sig
Drv seat lumbar dn sw sig
Drv seat lumbar forward sw sig
Drv seat lumbar rearward sw sig
Drv seat lumbar up sw sig
Forward
Front vertical down
Front vertical down sw sig
Front vertical mtr pos sens sig
Front vertical up
Front vertical up sw sig
Gmlan serial data
Heated seat ctrl module status sig
Horizontal forward
Horizontal mtr pos sens sig
Horizontal rearward
Horz forward sw sig
Horz rearward sw sig
J349 (in left front seat harness, approximately 8 cm (4 in) from breakout for auxiliary power outlet connector)
Left
Lumbar horizontal pos sens sig
Lumbar vertical pos sens sig
Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame)
Nca
Pnk
Rear vertical down
Rear vertical down sw sig
Rear vertical mtr pos sens sig
Rear vertical up
Rear vertical up sw sig
Rearward
Recline forward
Recline mtr forward ctrl
Recline mtr pos sens sig
Recline mtr rearward ctrl
Recline rearward
Rh seat back tempt sens sig
Rh seat cushion tempt sens sig
Rh seat mode signal
Right
Steering column tilt sens sig
Tan
Telescope forward sw sig
Telescope rev sw sig
Telescope sens sig
Tilt down sw sig
Tilt up sw sig

NAVIGATION

Navigation Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Navigation Wiring Diagram for Buick Lucerne CXS 2008:

Antenna
Battery
Cellular microphone (in overhead console)
Cellular telephone antenna
Computer data lines system
Drain
Drain wire
Drain wire voice rec low ref
G305 (under driver's seat)
Gmlan serial data
Gps antenna
Ground
Hot at all times
Navigation antenna
Navigation voice sig voice rec aud sig
Radio
Radio fuse 44 15a
Rear fuse block (below left side of rear seat)
Rec aud sig
Rec low ref
Signal
Vehicle communication interface module (vcim) (if equipped) (on right front of trunk, attached to seat back brace)
W/ onstar
W/o onstar
X3 a2

Parking Assistant Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Parking Assistant Wiring Diagram for Buick Lucerne CXS 2008:

Batt pos volt
Center amber ind
Center amber ind ctrl
Computer data lines system
Driver door module (ddm)
Driver door outside rearview mirror
Front passenger door module (fpdm)
G301 (under left rear seat)
G403 (right front wall of luggage compt)
Gnd
Ground
Hot at all times
J400 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor)
J401 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor)
J402
J405
Led ctrl
Left amber ind
Left amber ind ctrl
Left rear corner object alarm sensor (on left corner of rear bumper fascia)
Left rear middle object alarm sensor (on left middle of rear bumper fascia)
Left side object sensor
Low ref
Low serial data
Low speed gmlan serial data
Lr corner object sensor sig
Lr middle object sensor sig
Mdl-rpa fuse 12 10a
Object alarm module (on right rear wheelwell)
Object sensor sply volt
Passenger door outside rearview mirror
Pnk
Rear fuse block (below left side of rear seat)
Rear parking assist (rpa) display
Red ind
Red ind ctrl
Right rear corner object alarm sensor (on right corner of rear bumper fascia)
Right rear middle object alarm sensor (on right middle of rear bumper fascia)
Right side object sensor
Rr corner object sensor sig
Rr middle object sensor sig
Serial data
Telltale assembly sply volt

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008

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List of elements for Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CXS 2008:

(in engine harness, approximately 41 cm (16 in) from underhood fuse block connector c3) j111
(in ip harness, between x201 & x202) j229
(on right front of engine compt, forward of strut tower) underhood fuse block
3.8l
4.6l
A/c cltch fuse 10a
A/c clutch relay 34
Abs fuse 23 50a
Abs mtr fuse 25 60a
Air bag fuse 11 10a
Air pump fuse 50a
Air pump relay 37
Air/ sol fuse 15a
Air/sol relay 35
Automatic a/c
Automatic transmission
Battery
Ecm/ pcm fuse 9 10a
Electronic brake control module (ebcm)
Engine control module (ecm) (4.6l) powertrain control module (pcm) (3.8l)
Fan 1 fuse 30a
Fan 1 relay 33
Fan 2 fuse 30a
Fan 2 relay 31
Fog lamp pcb relay
From b trn/sig pcb relay (diagram 1 of 5)
From body control module (diagram 5 of 5)
Fusible link
G112 (lower left rear of engine)
Generator
High/beam pcb relay
Horn pcb relay
Hvac control module
Hvac/ipc ign 1 fuse 10 10a
Ign relay 36
Inflatable restraint i/p module indicator
Inflatable restraint sensing & diagnostic module (sdm)
Instrument panel cluster (ipc)
J105 (4.6l)
Lo/beam pcb relay
Manual a/c
Pnk
Pnk/red
Pwr/train relay 29
Recirculation actuator
Red
Starter motor
Strtr fuse 40a
Strtr relay 30
To rear fuse block (diagram 2 of 5)
To wpr fuse (diagram 1 of 5)
Trans ign 1 fuse 8 10a
Transmission control module (tcm)
Trn/sig pcb relay
W/ heated nozzle
Windshield washer solvent heater
Wpr fuse 25a
Wpr hi pcb relay
Wpr pcb relay
Wsh pcb relay
Wsw htr fuse 28 60a
X101

Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008

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List of elements for Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CXS 2008:

(below left side of rear seat) rear fuse block
(in body harness, approximately 10 cm (4 in) from audio amplifier connector c1) j366
(in engine harness, approximately 80 cm (31 in) from underhood fuse block connector c3) j100
(info not available)
3.8l
4.6l
A12
Amp-rdo fuse 38 30a
Audio amplifier
B12
Bcm fuse 40 10a
Data link connector (dlc)
Ddm fuse 22 15a
Digital radio receiver
Driver door module (ddm)
E11
Ecm/tcm fuse 5 15a
Engine control module (ecm)
From battery (diagram 1 of 5)
From c amp-rdo fuse 38 (diagram 2 of 5)
Front passenger door module (fpdm)
Garage door opener transmitter
Hvac control module
If equipped
Inflatable restraint passenger presence system (pps) module
Inflatable restraint sensing & diagnostic module (sdm)
Instrument panel cluster (ipc)
J392
Mdl-frt fuse 9 30a
Mdl-onstar fuse 42 10a
Mdls-body fuse 43 10a
Passkey fuse 13 10a
Pdm fuse 29 15a
Pnk/ red
Powertrain control module (pcm)
Radio
Radio fuse 44 15a
Red
Remote control door lock receiver (rcdlr)
Sdm fuse 30 10a
Seat climate control module
Sol can fuse 34 10a
Tan/ red
Theft deterrent module (tdm)
To ign swtch fuse 21 (diagram 3 of 5)
To mdls-body fuse 43 (diagram 2 of 5)
Transmission control module (tcm)
Vehicle communication interface module
Vehicle direction alert alarm warning module
W/ lane departure warning sensor indicator
W/ onstar
W/o lane departure warning sensor indicator

Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008

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List of elements for Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CXS 2008:

(below left side of rear seat) rear fuse block
(in right front seat harness, approximately 114 cm (45 in) from passenger seat adjuster switch connector) j348
A11
Apos fuse 31 20a
Automatic level control (alc) compressor
Automatic level control module
Bcm (chmsl) fuse 39 10a
Bcm (dim) fuse 18 10a
Bcm (inadv) fuse 32 10a
Bcm (lttn) fuse 25 15a
Bcm (rttn) fuse 36 15a
Blower motor control module
Body control module (bcm)
Breakout to right rear corner object alarm sensor) j405
C10
Center console accessory power outlet
Cigar lighter
Comp relay fuse 24 10a
Driver seat adjuster switch
E12
Electronic suspension control (esc) module
From d pdm fuse 29 (diagram 2 of 5)
From e mdl-rtd fuse 15 (diagram 3 of 5)
Front auxiliary power outlet (w/ custom seat)
G300 (under driver's seat)
G304 (under right front passenger's seat)
Ign switch fuse 21 5a
J221
J307
J388 (in body harness, approximately 27 cm (11 in) from branch for rear fuse block)
Left side object sensor
Level comp fuse 47 40a
Level comp relay 53
Ltr-cig fuse 26 20a
Mdl-mem fuse 6 10a
Mdl-rpa fuse 12 10a
Mdl-rtd fuse 15 25a
Memory seat module (if equipped)
Mtr fuse 48 (automatic a/c) blower fuse 49 (manual a/c) 40a
Passenger lumbar adjuster switch
Passenger seat adjuster switch
Pwr seat circuit breaker 55 25a
Pwr t/t circuit breaker 57 25a
Rear object sensor control module
Red/ pnk
Rf seat circuit breaker 54 25a
Right side object sensor
To ignition switch (diagram 5 of 5)
To mdl-rpa fuse 12 (diagram 3 of 5)
To rap-hc relay 70 (diagram 4 of 5)
Trunk relse relay 67
W/ air suspension
W/ custom seat
W/ individual seat
W/ magneto rheological
W/ memory seat
W/ multi- directional
W/ obstacle detection sensor indicator
W/ power tilt telescoping steering column
W/ rear parking assist
W/o memory seat
W/o multi- directional

Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008

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List of elements for Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CXS 2008:

(below left side of rear seat) rear fuse block
(chmsl) fuse 39 (diagram 3 of 5)
(in body harness, approximately 19 cm (8 in) from breakout for g301)
(in center console harness, approximately 8 cm (3 in) from breakout for a/t shift lock control solenoid) j381
A11
Automatic transmission shift lever
B11
Bcm (ctsy) fuse 35 10a
Bcm fuse 19 10a
Body control module (bcm)
Circuit breaker 56 (diagram 4 of 5)
Driver door module (ddm)
Drl relay 65
E11
From bcm f
From pwr wdo g
Front passenger door module (fpdm)
Fuel/ pump relay 59
G301 (under left rear seat)
Heated steering wheel control module
Inflatable restraint steering wheel module coil
Inside rearview mirror
J302
Left rear door window switch
Level comp fuse 47 40a
Level comp relay 53
Nca
Park lp-lt relay 58
Park switch
Pwr wdo circuit breaker 56 25a
Rap-hc relay 70
Rap1 fuse 28 10a
Rap2 fuse 33 10a
Rear defog fuse 46 40a
Rear defog relay 52
Right rear door window switch
Run 1 fuse 20 7.5a
Run 2 fuse 10 10a
Run relay 64
S/roof fuse 17 25a
Seat climate control module
Sunroof control module (if equipped)
Tan
Tan/ pnk
To rear defog fuse 46 (diagram 4 of 5)
Unlock relay 62
Unlock relay 63
Unlock/lock fuse 14 20a
W/ custom seat
W/ front heated seat cooling
W/ heated nozzle
W/ heated steering wheel leather wrapped
W/ individual seat
W/o front heated seat cooling
Windshield outside moisture sensor (if equipped)
Windshield washer solvent heater
X276
X277

Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008

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List of elements for Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CXS 2008:

(in engine harness, approximately 13 cm (5 in) from breakout for x138) j104
(in steering column harness, between x203 & ignition switch connector) j201
3.8l
4.6l
Acc
Body control module (bcm)
Engine control module (ecm)
From ign sw fuse (diagram 3 of 5)
Ignition switch
Inflatable restraint steering wheel module coil
Key-in switch
Left steering wheel control switch
Off
Pnk
Powertrain control module (pcm)
Rear fuse block (below left side of rear seat)
Right steering wheel control switch
Run
Start
Stg illum fuse 8 2a
Theft deterrent module (tdm)
To ign relay 36 (diagram 1 of 5)
Transmission control module (tcm)
X276
X277

POWER DOOR LOCKS

Power Door Locks Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Power Door Locks Wiring Diagram for Buick Lucerne CXS 2008:

(in body harness, approximately 9 cm (3 in) from branch for x314) j343
(under center of rear package shelf) remote control door lock receiver (rcdlr)
(under left rear seat) g301
A11
A12
Battery
Body control module (bcm) (right of glove box)
Computer data lines system
Ddm fuse 22 15a
Dr lock act ctrl
Dr unlock act ctrl
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Drv dr key sw sig
Exterior lights system
Front passenger door latch assembly (rear of front passenger's door)
Front passenger door module (fpdm)
G104 (right front corner of engine compt)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
Gmlan serial data
Ground
Hood ajar sw sig
Hood ajar switch (w/ remote keyless entry) (center front of engine compt)
Hood closed sw sig
Horn rly ctrl
Horns system
Hot at all times
Ign
Instrument panel cluster (ipc)
J301
J337
J385
J700
J800
Keyless entry antenna
Keyless entry antenna sig
Left rear door latch assembly (rear of left rear door)
Lf dr ajar sw sig
Lf dr open sw sig
Lf dr sw low ref
Lock relay 63
Logic
Low spd gmlan ser data
Lr dr ajar sw sig
Lr dr lk mtr unlock
Lr dr open sw sig
Mdls- body fuse 43 10a
Nca
Park lamp rly ctrl
Pdm fuse 29 15a
Pwr wdo circuit breaker 25a
Rear fuse block (below left side of rear seat)
Rf dr ajar sw sig
Rf dr open sw sig
Rf dr sw low ref
Right rear door latch assembly (rear of right rear door)
Rr dr ajar sw sig
Rr dr lk mtr unlock
Security ind
Serial data
Tan
Tan/ red
Tan/red
Unlock relay 62
Unlock/ lock fuse 14 20a
W/ theft deterrent system
W/o theft deterrent system

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Electrochromic Mirror Wiring Diagram for Buick Lucerne CXS 2008:

(left rear of luggage compt) g402
Automatic day/night mirror
Button back lighting
Day/night mirror sig
Driver outside rearview mirror (in driver's door)
Emergency ind
Emergency switch
Exterior lights system
Ground
Hot w/ rap-hc relay 70 energized
Ign
Inside rearview mirror
J312
Keypad green led ind
Keypad green led sig
Keypad red led ind
Keypad red led sig
Keypad sig
Logic
Low ref
Nca
Onstar ind
Onstar keypad
Onstar switch
Phone ind
Phone switch
Power distribution system
Rap 2 fuse 33 10a
Rear fuse block (below left side of rear seat)
Vehicle communication interface module (vcim) (w/ onstar) (on right front of trunk, attached to seat back brace)

Power Mirrors Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Power Mirrors Wiring Diagram for Buick Lucerne CXS 2008:

5v ref
A12 x2
Automatic day/night mirror
Battery positive voltage
Computer data lines system
Ddm fuse 22 15a
Defogger system
Driver door module (ddm)
Driver mir horz pos sens sig
Driver mir ver pos sens sig
Driver outside rearview mirror (in driver's door)
Electrochromic mirror circuit
Exterior lights system
Front passenger door module (fpdm)
Heating element
Hot at all times
Left mir mtr dn ctrl
Left mir mtr left ctrl
Left mir mtr up/right ctrl
Low gmlan
Low ref
Nca
Outside rearview mirror switch
Pass mir horz pos sens sig
Pass mir mtr left ctrl
Pass mir ver pos sens sig
Passenger outside rearview mirror (in front passenger door)
Pdm fuse 29 15a
Rear fuse block (below left side of rear seat)
Right mir mtr dn ctrl
Right mir mtr up/right ctrl
Tan/ red
Tan/pnk
Tan/red

POWER SEATS

6-Way Power Seat Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for 6-Way Power Seat Wiring Diagram for Buick Lucerne CXS 2008:

A11
Driver seat adjuster motor assembly (below driver seat)
Driver seat adjuster switch
Driver seat front vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
E12 x1
Forward
Front down
Front passenger seat adjuster motor assembly (below front passenger's seat)
Front passenger seat front vertical motor
Front passenger seat horizontal motor
Front passenger seat rear vertical motor
Front up
G300 (under driver's seat)
G304 (under right front passenger's seat)
Hot at all times
J387
Nca
Passenger seat adjuster switch
Pwr seat circuit breaker 55 25a
Rear down
Rear fuse block (below left side of rear seat)
Rear up
Rearward
Red/ pnk
Rf seat circuit breaker 54 25a
Tan

8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for 8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CXS 2008:

E12 x1
Forward
Front down
Front passenger seat adjuster motor assembly (below front passenger's seat)
Front passenger seat front vertical motor
Front passenger seat horizontal motor
Front passenger seat rear vertical motor
Front passenger seat recline motor
Front up
G304 (under right front passenger's seat)
Hot at all times
J306
J348
Nca
Passenger seat adjuster switch
Rear down
Rear up
Rearward
Recline forward
Recline rearward
Rf seat circuit breaker 54 25a
Tan

Heated Steering Wheel Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Heated Steering Wheel Wiring Diagram for Buick Lucerne CXS 2008:

D x277
F3 x2
G300 (under driver's seat)
Ground
Heated steering wheel
Heated steering wheel control module
Heated steering wheel on ind
Heated steering wheel switch
Hot w/ run relay 64 energized
Ign 1 vol
Ind ctrl
Inflatable restraint steering wheel module coil (top of steering wheel)
J204
J219
Left steering wheel control switch
Nca
Rear fuse block (below left side of rear seat)
Red
Run 1 fuse 20 7.5a
X276 d
X276 h
X277 h

Lumbar Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Lumbar Wiring Diagram for Buick Lucerne CXS 2008:

Down
E12
Forward
Front passenger seat lumbar motor
G304 (under right front passenger's seat)
Hot at all times
J306 (w/ 8 way)
J348 (w/ 8 way)
Passenger lumbar adjuster switch
Pnk
Rear fuse block (below left side of rear seat)
Rearward
Rf seat circuit breaker 54 25a

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Power Top/Sunroof Wiring Diagram for Buick Lucerne CXS 2008:

(not used)
Accessory vol
Close ctrl
Close sig
Close vent sig
Dimming
E11
Express sig
G402 (left rear of luggage compartment)
G403 (right front wall of luggage compartment)
Ground
Hot w/ rap-hc relay energized
Ign
Interior lights system
J313
J330
Open ctrl
Open sig
Open vent sig
Pnk
Power distribution system
Rap2 fuse 33 10a
Rear fuse block (below left side of rear seat)
Roof close
Roof express
Roof open
Sunroof control module (rear of sunroof opening)
Sunroof fuse 17 25a
Sunroof motor
Sunroof switch
Tan
Vent close
Vent express
Vent express sig
Vent open

POWER WINDOWS

Power Windows Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Power Windows Wiring Diagram for Buick Lucerne CXS 2008:

(under left rear seat) g301
(under right front passenger's seat) g304
A11
Batt volt
Body control module (bcm) (right of glove box)
Computer data lines system
Driver door module (ddm)
Driver door window switch
Driver window motor (in driver's door)
Front passenger door module (fpdm)
Front passenger door window switch
Front passenger window motor (in front passenger's door)
G300 (under driver's seat)
G304 (under right front passenger's seat)
Gmlan serial data
Ground
Hot at all times
Interior lights system
J337
J700
J800
Left front down ctrl
Left front up ctrl
Left rear down ctrl
Left rear down sig
Left rear up ctrl
Left rear up sig
Left rear window motor (in left rear door)
Left rear window switch
Logic
Master sw sig
Pwr wdo circuit breaker 56 25a
Rear fuse block (below left side of rear seat)
Right rear down ctrl
Right rear down sig
Right rear sig
Right rear up ctrl
Right rear up sig
Right rear window motor (in right rear door)
Right rear window switch
Sply volt

RADIO

Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CXS 2008

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List of elements for Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CXS 2008:

(on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim)
(or 7043)
(or 7044)
(under driver's seat) g305
14v sw sply volt
14v sw sply voltage
Amplifier control
Antenna sig
Antenna signal
Anti-lock brakes system
Audio common sig
Audio communication sig
Backlight lamp ctrl
Bare
Battery
Battery pos voltage
Cellular navigation & digital radio antenna (if equipped) (center rear of roof)
Computer data lines system
Device left audio sig
Digital radio receiver (drr) (at left "d" pillar)
Drain wire
Drain wire audio lo ref
Front audio drain wire
G305 (under driver's seat)
Global positioning system (gps) antenna (under top center of dash)
Gps antenna
Ground
Hot at all times
Interior lights system
Lf low level audio (-)
Lf low level audio sig
Lr low level audio (-)
Lr low level audio sig
Navigation system
Navigation voice sig voice recognition audio sig
Pnk
Radio
Radio antenna module (at right "d" pillar)
Radio audio (-)
Radio fuse 44 15a
Radio left audio sig
Rear audio drain wire
Rear fuse block (below left side of rear seat)
Remote radio audio (-)
Remote radio left audio sig
Rf low level audio (-)
Rf low level audio sig
Right audio sig (1)
Right audio sig (2)
Right audio signal (1)
Right audio signal (2)
Rr low level audio (-)
Rr low level audio sig
Serial data
Speed gmlan serial data
Tan
Tan/red
Vehicle speed sig
W/ onstar
W/o onstar

Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CXS 2008:

Amp-rdo fuse 38 30a
Amplifier (mounted to left rear of rear seat)
Amplifier ctrl
Battery
Body control module (bcm) (right of glove box)
Computer data lines system
Cruise control system
Ctrl sig
E11 x3
F cen spkr (+)
F cen spkr (-)
Front speaker
G305 (under driver's seat)
Ground
Hot at all times
Inflatable restraint steering wheel module coil (top of steering column)
Info
J361 (in body harness, between x300 & amplifier)
J362 (in body harness, between x300 & amplifier)
J363 (in body harness, between x301 & amplifier)
J364 (in body harness, between x301 & amplifier)
J365
J366
Left front door speaker
Left front tweeter speaker
Left rear speaker
Lf low level (-)
Lf low level sig
Lf speaker (+)
Lf spkr sig (-)
Lo spd
Lr low level (-)
Lr low level sig
Lr mid spkr (+)
Lr mid spkr (-)
Lr speaker (-)
Lr spkr sig (+)
Module coil) j220
Mute
Nca
Pnk
Rear fuse block (below left side of rear seat)
Rf low level (-)
Rf low level sig
Rf speaker (+)
Rf spkr sig (-)
Right front door speaker
Right front tweeter speaker
Right rear speaker
Right steering wheel control switch
Rr low level (-)
Rr low level sig
Rr mid spkr (+)
Rr mid spkr (-)
Rr speaker (+)
Rr spkr sig (-)
Seek dn
Seek up
Ser data
Source
Tan
Tan/red
Volt sply
Volume dn
Volume up
X276
X277

Radio Wiring Diagram, without Amplifier for Buick Lucerne CXS 2008

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List of elements for Radio Wiring Diagram, without Amplifier for Buick Lucerne CXS 2008:

(in body harness, between x300 & amplifier) j361
(in body harness, between x301 & amplifier) j363
(on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim)
(or 7043)
(or 7044)
14v sw sply volt
14v sw sply voltage
Antenna sig
Antenna signal
Anti-lock brakes system
Audio common sig
Audio communication sig
Backlight lamp ctrl
Bare
Battery
Body control module (bcm) (right of glove box)
Computer data lines system
Cruise control system
Ctrl sig
Device left audio sig
Drain wire
Drain wire audio lo ref
G305 (under driver's seat)
Global positioning system (gps) antenna (under top center of dash)
Gps antenna
Ground
Hot at all times
Inflatable restraint steering wheel module coil (top of steering column)
Info
Interior lights system
J220 (in steering column harness, between cruise control on/off switch & inflatable restraint steering wheel module coil)
J362 (in body harness, between x300 & amplifier)
J364 (in body harness, between x301 & amplifier)
Left front door speaker
Left front spkr (+)
Left front spkr sig (-)
Left front tweeter speaker
Left rear speaker
Lo spd ser data
Lr midrange speaker (-)
Lr midrange spkr (+)
Mute
Navigation system
Navigation voice sig recognition audio sig
Nca
Pnk
Radio
Radio antenna module (at right "d" pillar)
Radio fuse 44 15a
Rear fuse block (below left side of rear seat)
Right front door speaker
Right front spkr (+)
Right front spkr sig (-)
Right front tweeter speaker
Right rear speaker
Right steering wheel control switch
Rr midrange spkr (+)
Rr midrange spkr (-)
Seek dn
Seek up
Source
Speed gmlan serial data
Sply volt
Tan
Vehicle speed sig
Volume dn
Volume up
W/ onstar
W/o onstar
X276
X277
X3 a2

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Shift Interlock Wiring Diagram for Buick Lucerne CXS 2008:

3.8l
4.6l (vin y)
5 volt ref
A/t shift lock control solenoid
A3 x1
Automatic transmission
B7 x2
Body control module (bcm) (right of glove box)
Brake pedal position sensor (top of brake pedal assembly)
Computer data lines system
D n
Data bus +
Data bus -
Engine control module (ecm) (4.6l) (left side of engine compt)
Floor shifter assembly (w/ custom seat)
G112 (lower left rear of engine)
G300 (under driver's seat)
G304 (under right front passenger's seat)
Hot w/ rap-hc relay 70 energized
Hot w/ run relay 64 energized
Ignition lock cylinder control solenoid
Interior lights system
J105
J204
J302 (w/ climate control seats)
J381
J383
Low ref
Nca b
Nca c
Nca d
Nca e
Nca f
Park switch (on top of park brake assembly)
Powertrain control module (pcm) (3.8l) (left front of engine compt, inside air cleaner housing)
Prndl lamp
Range sig a
Range sig b
Range sig c
Range sig p
Rap 1 fuse 28 10a
Rear fuse block (below left side of rear seat)
Reverse lockout solenoid
Run 2 fuse 10 10a
Sensor sig
Sol ctrl
Supp volt
Switch signal a
Switch signal b
Switch signal c
Switch signal p
Tan
Transmission control module (tcm) (4.6l) (left rear of engine compt)
Transmission internal mode switch (ims)
W/ custom seat/ floor shifter
W/ individual seat/ column shifter

STARTING/CHARGING

Charging Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Charging Wiring Diagram for Buick Lucerne CXS 2008:

3.8l
4.6l
Battery
Battery current sensor (below right side of rear seat)
Battery ind
Battery positive volt
Bcm (lttn) fuse 25 15a
Body control module (bcm) (right of glove box)
Computer data lines system
Current sensor low ref
Current sensor sig
Fusible link
G303 (below right side of rear seat)
Gen f-term
Gen l-term
Generator
Ground
Hi speed gmlan serial data +
Hi speed gmlan serial data -
Ign
Inside air cleaner housing)
Instrument panel cluster (ipc)
Lo spd gmlan serial data
Logic
Pnk
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (4.6l: left side of engine compt) (3.8l: left front of engine compt,
Rear fuse block (below left side of rear seat)
Red
Serial data
Starter motor
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

Starting Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Starting Wiring Diagram for Buick Lucerne CXS 2008:

(3.8l)
(4.6l)
3.8l
4.6l
Acc
Automatic transmission
Battery
Body control module (bcm) (right of glove box)
Charging circuit
Computer data lines system
Ecm/ crank fuse 1 15a
Ecm/pcm fuse 9 10a
G112 (lower left rear of engine)
G303 (below right side of rear seat)
Ground distribution system
Hi speed gmlan serial data +
Hi speed gmlan serial data -
Hot at all times
Hot w/ powertrain relay energized
Ign
Ign relay 36
Ign sw fuse 21 5a
Ignition switch
Internal mode switch (ims)
J101
J105
Off
Park/neutral sig
Pnk
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (4.6l: left side of engine compt) (3.8l: left front of engine compartment, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Red
Run
Start
Starter ctrl
Starter motor
Strtr fuse 24 40a
Strtr relay 30
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)
X101

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CXS 2008:

"b" pillar)
(in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor) j370
(in steering wheel) inflatable restraint steering wheel module
(right side of dash) inflatable restraint i/p module
(under right front
A1 x207
A1 x211
Air bag fuse 11 10a
Batt positive vol
Case ground
Computer data lines system
Ground
High control
Hot w/ ign relay energized
Ign 1 vol
Inflatable restraint sensing & diagnostic module (sdm) (under center console)
Inflatable restraint steering wheel module coil (top of steering column)
Left inflatable restraint front end sensor (left front of engine compartment)
Left inflatable restraint side impact module (left side of driver's seat back)
Left inflatable restraint side impact sensor (sis) (base of left "b" pillar)
Left seat belt buckle
Left seat belt switch
Low control
Low reference
Low speed
Nca
Passenger's seat) g302
Pin shorting bars engaged
Pnk
Pnk/ red
Pnk/red
Right inflatable restraint front end sensor (right front of engine compartment)
Right inflatable restraint seat position sensor (sps) (on front passenger's seat left seat rail)
Right inflatable restraint side impact module (right side of front passenger's seat back)
Right inflatable restraint side impact sensor (sis) (base of right
Sensor signal
Sensor voltage
Shorting bar
Stage 1
Stage 2
Switch signal
Tan
Tan/ pnk
Tan/pnk
Underhood fuse block (on right front of engine compt, forward of strut tower)
When module connector is disconnected from harness: (shorting bars are connected between following pins: 4-5, 6-7, 8-9, 10-11, 14-15, 20-21 & 22-23)

Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CXS 2008:

(left rear of luggage compt) g402
(under driver's seat) g300
Air bag ind
Batt positive vol
Belt tension sensor
Computer data lines system
Gmlan (sdm)
Ground
Hot at all times
Ign
Inflatable restraint i/p module indicator
Inflatable restraint passenger presence system (pps) module (under front passenger's seat)
Inflatable restraint passenger presence system (pps) sensor (under front passenger's seat)
Inflatable restraint seat belt tension sensor
Instrument panel cluster (ipc)
J312
Left front seat belt pretensioner
Left inflatable restraint roof rail module (if equipped) (left roof rail)
Logic
Low reference
Nca
Off ind
On ind
Pass air bag off ind ctrl
Pass air bag on ind ctrl
Pass seat belt ind
Passenger air bag ind
Pnk
Pnk/ red
Pnk/red
Pnk/tan
Rear fuse block (below left side of rear seat)
Right front seat belt pretensioner
Right inflatable restraint roof rail module (if equipped) (right roof rail)
Right seat belt buckle
Sdm fuse 30 10a
Seat belt ind
Sensor signal
Serial data
Shorting bar
Tan
Tan/pnk
Voltage reference

TRANSMISSION

3.8L VIN 2

3.8L VIN 2, Transmission Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for 3.8L VIN 2, Transmission Wiring Diagram for Buick Lucerne CXS 2008:

(left rear of engine)
(lower left rear of engine) g112
(not used)
(throttle pos)
1-2 shift sol
1-2 shift solenoid (ss) valve
2-3 shift sol
2-3 shift solenoid (ss) valve
5 volt ref 2
At iss sig high
At iss sig low
Automatic transmission
Automatic transmission fluid pressure manual valve position switch
Automatic transmission fluid temperature (tft) sensor
Automatic transmission input shaft speed (iss) sensor
Battery
Code a
Code b
Code c
Ecm/ tcm fuse 5 15a
Ecm/pcm fuse 9 10a
Ect sensor sig
Engine coolant temperature (ect) sensor
Exterior lights system
Hot at all times
Hot w/ ign relay 36 energized
Ignition 1
Low ref
Manifold absolute pressure (map) sensor (on top front of engine)
Map sensor sig
P/n
Parity
Pc sol high
Pc sol low
Pnk
Powertrain control module (left front of engine compt, inside air cleaner housing)
Pressure control (pc) solenoid valve
Rear fuse block (below left side of rear seat)
Red a
Red j115
Stop lmp sw sig
Tan
Tan b
Tcc sol
Tcc sw sig
Tft sensor sig
Throttle actuator control (tac) module (on throttle body assembly)
Torque converter clutch (tcc) solenoid valve
Tr sig a
Tr sig b
Tr sig c
Tr sig p
Trans ign 1 fuse 8 10a
Transmission internal mode switch (ims)
Uart data
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle speed sensor (vss) (in transmission)
Vss sig high
Vss sig low

4.6L VIN 9

4.6L VIN 9, Transmission Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN 9, Transmission Wiring Diagram for Buick Lucerne CXS 2008:

(in transmission) vehicle speed sensor (vss)
(right of glove box) body control module (bcm)
Acc
Automatic transmission
Automatic transmission input shaft speed (iss) sensor
Battery
Computer data lines system
Ecm/tcm fuse 5 15a
Engine control module (ecm) (left side of engine compartment)
Exterior lights system
G112 (lower left rear of engine)
Gmlan serial data
Ground
Hot at all times
Hot w/ ign relay 36 energized
Ign 1
Ignition switch
Iss high sig
Iss low sig
J100
J104
J105
J111
J201
Low ref
Nca
Off
Oss low sig
P/n signal
Pc sol hi ctrl
Pc sol vlv ctrl
Pnk
Pressure control (pc) solenoid valve
Rear fuse block (below left side of rear seat)
Run
Ser data
Serial data
Serial data bus+
Serial data bus-
Shift sol vlv a
Shift sol vlv b
Shift solenoid valve a
Shift solenoid valve b
Start
Stop lamp sw sig
Tan
Tcc sol ctrl
Tft sens sig
Torque converter clutch (tcc) solenoid valve
Trans ign 1 fuse 8 10a
Trans range a
Trans range b
Trans range c
Trans range p
Transmission control module (tcm) (left rear of engine compartment)
Transmission fluid temperature (tft) sensor
Transmission internal mode switch (ims)
Underhood fuse block (on right front of engine compartment, forward of strut tower)
Vss hi sig

4.6L VIN Y

4.6L VIN Y, Transmission Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for 4.6L VIN Y, Transmission Wiring Diagram for Buick Lucerne CXS 2008:

(in transmission) vehicle speed sensor (vss)
(right of glove box) body control module (bcm)
Acc
Automatic transmission
Automatic transmission input shaft speed (iss) sensor
Battery
Computer data lines system
Ecm/tcm fuse 5 15a
Engine control module (ecm) (left side of engine compartment)
Exterior lights system
G112 (lower left rear of engine)
Gmlan serial data
Ground
Hot at all times
Hot w/ ign relay 36 energized
Ign 1
Ignition switch
Iss high sig
Iss low sig
J100
J104
J105
J111
J201
Low ref
Nca
Off
Oss low sig
P/n signal
Pc sol hi ctrl
Pc sol vlv ctrl
Pnk
Pressure control (pc) solenoid valve
Rear fuse block (below left side of rear seat)
Run
Ser data
Serial data
Serial data bus+
Serial data bus-
Shift sol vlv a
Shift sol vlv b
Shift solenoid valve a
Shift solenoid valve b
Start
Stop lamp sw sig
Tan
Tcc sol ctrl
Tft sens sig
Torque converter clutch (tcc) solenoid valve
Trans ign 1 fuse 8 10a
Trans range a
Trans range b
Trans range c
Trans range p
Transmission control module (tcm) (left rear of engine compartment)
Transmission fluid temperature (tft) sensor
Transmission internal mode switch (ims)
Underhood fuse block (on right front of engine compartment, forward of strut tower)
Vss hi sig

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Trunk Release Wiring Diagram for Buick Lucerne CXS 2008:

(under right front passenger's seat) g304
A8 x1
Body control module (bcm) (right of glove box)
G301 (under left rear seat)
G402 (left rear of luggage compt)
Headlamp switch
Hot at all times
Interior lights system
J206
Rear compartment lid latch (center rear of luggage compt)
Rear fuse block (below left side of rear seat)
Trk rel fuse 37 10a
Trk rel relay 67
Trunk ajar sw sig x6
Trunk release ctrl x2
Trunk release relay ctrl x7
X2 b8
X3 e10

WARNING SYSTEMS

Chime Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Chime Wiring Diagram for Buick Lucerne CXS 2008:

(on master cylinder reservoir) brake fluid level switch
(w/ rke) keyless entry antenna
Acc
Audible alarm
Auto
Battery positive volt
Bcm (chmsl) fuse 39 10a
Bcm (lttn) fuse 25 15a
Bcm (rttn) fuse 36 15a
Body control module (bcm) (right of glove box)
Brake ind
Coax
Computer data lines system
D9 x2
D9 x3
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Driver information center (dic)
Engine coolant temperature ind
Exterior lights system
G300 (under driver's seat)
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
Gmlan
Gmlan serial data
Gmlan serial data gmlan serial data
Ground
Head
Headlamp switch
Hot at all times
Ignition switch
Inflatable restraint sensing & diagnostic module (under center console)
Instrument panel cluster (ipc)
Ipc
J206
J370 (in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor)
J385
Key-in ignition switch
Keyless entry/ tire pressure antenna signal
Left seat belt buckle
Left seat belt switch
Lf door ajar sw sig
Lf door open sw sig
Lf door sw low ref
Lf seat belt sw sig
Logic
Low engine oil pressure ind
Low ref
Low spd serial data
Low tire pressure ind
Lt turn sig switch
Nca
Off
Off/run crank vol
Park
Park brake sw sig
Park brake switch (on top of park brake assembly)
Park lp sw sig
Radio
Rear fuse block (below left side of rear seat)
Remote control door lock receiver (rcdlr) (under center of rear package shelf)
Rt turn sig switch
Run
Seat belt ind
Start
Sw-ign fuse 21 5a
Tan/ pnk
Tan/pnk
W/ theft deterrent system
W/o theft deterrent system
X2 e1

Lane Departure Warning Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Lane Departure Warning Wiring Diagram for Buick Lucerne CXS 2008:

(left rear corner of trunk) g402
B1 x3
Batt
Computer data lines system
Driver information center (dic)
Gnd
Headlamp switch (left side of instrument panel)
Hot at all times
Instrument panel cluster (ipc)
Interior lights system
J312
J392
Lane departure ind
Lane dept warn ctrl
Left turn ind
Logic
Mdls- body fuse 43 10a
Rear fuse block (under left rear seat)
Right turn ind
Serial data
Vehicle direction alert alarm warning module

WIPER/WASHER

Wiper/Washer Wiring Diagram for Buick Lucerne CXS 2008

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List of elements for Wiper/Washer Wiring Diagram for Buick Lucerne CXS 2008:

Acc volt
Batt pos volt
Body control module (bcm) (right of glove box)
Delay switch
Driver information center (dic)
Fluid ind ctrl
Fluid sw sig
G101 (left front corner of engine compt)
G104 (right front corner of engine compt)
G300 (under driver's seat)
G304 (under right front passenger's seat)
G402 (left rear of luggage compt)
Ground
Heated washer fluid ind ctrl
Heated washer fluid switch
High
High speed rly ctrl
Hot at all times
Hot w/ rap-hc relay 70 energized
Hot w/ run relay 64 energized
Instrument panel cluster (ipc)
Int
J204
J312
Logic
Low
Low washer fluid ind sig
Mist
Off
Park sw sig
Park switch
Pnk
Power distribution system
Rap 2 fuse 33 10a
Rear fuse block (below left side of rear seat)
Run 2 fuse 10 10a
Run ign 3 volt
Sen sig 1
Sen sig 2
Sensor signal 1
Sensor signal 2
Tan
Turn signal/multi-function switch
Underhood fuse block (on right front of engine compt, forward of strut tower)
Washer rly ctrl
Washer sw sig
Washer switch
Windshield outside moisture sensor (if equipped) (above rearview mirror on windshield)
Windshield washer fluid level switch (bottom of windshield washer fluid reservoir)
Windshield washer fluid pump (bottom of windshield washer fluid reservoir)
Windshield washer solvent heater (w/ heated nozzles)
Windshield wiper motor (on left side of firewall)
Wiper rly ctrl
Wiper sw high sig
Wiper sw low sig
Wiper switch
Wpr fuse 25a
Wpr hi pcb relay
Wpr pcb relay
Wsh pcb relay
Wsw htr fuse 60a
Wsw mtr fuse 19 15a
X1 j3
X2 k2