Buick LaCrosse CX 2009 - 2009 GENERAL MOTORS LaCrosse

Buick LaCrosse CX 2009 - BUZZERS, RELAYS & TIMERS

Buick LaCrosse CX 2009 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C CMPRSR Relay (5.3L)	Underhood fuse block. See Fig. 75.
A/C COMP Relay (3.8L)	Underhood fuse block. See Fig. 46.
CRANK Relay	Underhood fuse block. See Fig. 46.
FAN 1 Relay (3.8L)	Underhood fuse block. See Fig. 46.
FAN 1 Relay (5.3L)	Underhood fuse block. See Fig. 75.
FAN 2 Relay (3.8L)	Underhood fuse block. See Fig. 46.
FAN 2 Relay (5.3L)	Underhood fuse block. See Fig. 75.
FAN 3 Relay (3.8L)	Underhood fuse block. See Fig. 46.
FAN 3 Relay (5.3L)	Underhood fuse block. See Fig. 75.
FOG LP Relay (3.8L)	Underhood fuse block. See Fig. 46.
FOG LPS (PCB) Relay (5.3L)	Integral underhood fuse block.
FUEL PP Relay (3.8L)	Underhood fuse block. See Fig. 46.
FUEL/PUMP Relay (5.3L)	Underhood fuse block. See Fig. 75.
HDM BEAM Relay (3.8L)	Underhood fuse block. See Fig. 46.
HDM Relay (5.3L)	Underhood fuse block. See Fig. 75.
Heated Seat Relay (Driver's)	Under driver's seat. See Fig. 38.
Heated Seat Relay (Passenger's)	Under front passenger's seat. See Fig. 61.
HI BEAM Relay (3.8L)	Underhood fuse block. See Fig. 46.
HIGH BEAM (PCB) Relay (5.3L)	Integral underhood fuse block.
HORN (PCB) Relay (5.3L)	Integral underhood fuse block.
HORN Relay (3.8L)	Underhood fuse block. See Fig. 46.
IGNITION MAIN (PCB) Relay (5.3L)	Integral underhood fuse block.
IGN 1 Relay	Underhood fuse block. See Fig. 46.
PRK/LAMP Relay	I/P fuse block. See Fig. 47.
P/TRAIN Relay (3.8L)	Underhood fuse block. See Fig. 46.
PWR/TRN Relay (5.3L)	Underhood fuse block. See Fig. 75.
RAP Relay	I/P fuse block. See Fig. 47.
R/DEFOG	I/P fuse block. See Fig. 47.
Secondary Air Injection (AIR) Pump Relay	Near air cleaner duct.
Secondary Air Injection (AIR) Solenoid Relay	Near air cleaner duct.
STRTR Relay	Underhood fuse block. See Fig. 75.
WIPER HI PCB Relay (5.3L)	Integral underhood fuse block.
WIPER HI Relay	Underhood fuse relay. See Fig. 46.
WIPER PCB Relay (5.3L)	Integral underhood fuse block.
WIPER Relay	Underhood fuse block. See Fig. 46.

Buick LaCrosse CX 2009 - CIRCUIT PROTECTION DEVICES

Buick LaCrosse CX 2009 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Fuse Block - I/P	Right side of dash. See Fig. 30.
Fuse Block - Underhood	Right front strut tower. See Fig. 58.

Buick LaCrosse CX 2009 - CONTROL UNITS

Buick LaCrosse CX 2009 CONTROL UNITS LOCATION

Component	Location
Blower Motor Control Processor	Right side of dash. See Fig. 24.
Body Control Module (BCM)	Left side of dash. See Fig. 6.
Electronic Brake Control Module (EBCM)	Integral to brake pressure modulator valve. See Fig. 1.
Electronic Compass Module	Top right side of rear package shelf. See Fig. 7.
Engine Control Module (ECM) (4)	Left front of engine compartment. See Fig. 69.
HVAC Control Module	Center of dash. See Fig. 25.
Ignition Coil Module (ICM) (3.8L)	Top left front of engine. See Fig. 19.
Inflatable Restraint Front Passenger Presence System (PPS) Module (2)	Under front passenger's seat. See Fig. 66.
Inflatable Restraint I/P Module	Right side of dash. See Fig. 34.
Inflatable Restraint Roof Rail Module - Left	Left "C" pillar. See Fig. 34.
Inflatable Restraint Roof Rail Module - Right	Right "C" pillar. See Fig. 34.
Inflatable Restraint Sensing & Diagnostic Module (SDM)	Under front passenger's seat. See Fig. 35.
Inflatable Restraint Steering Wheel Module	In steering wheel. See Fig. 34.
Radio Antenna Module	Driver's side of headliner. See Fig. 22.
Rear Parking Assistant (RPA) Module	Center of rear package shelf. See Fig. 7.
Remote Control Door Lock Receiver (RCDLR)	Right side of dash. See Fig. 7.
Theft Deterrent Exciter Module	Part of ignition key cylinder. See Fig. 40.
Throttle Actuator Control (TAC) Module (3.8L)	At throttle body. See Fig. 13.
Throttle Actuator Control (TAC) Module (5.3L) (1)	Top rear of engine. See Fig. 70.
Transmission Control Module (TCM) (1)	Left front of engine compartment. See Fig. 69.
Vehicle Communications Interface Module (VCIM)	Center of dash. See Fig. 6.

Buick LaCrosse CX 2009 - MOTORS

Buick LaCrosse CX 2009 MOTORS LOCATION

Component	Location
Air Temperature Actuator	Right side of HVAC assembly. See Fig. 57.
Air Temperature Actuator (Left)	Left side of HVAC module. See Fig. 24.
Air Temperature Actuator (Right)	Right side of HVAC module. See Fig. 24.
Blower Motor	Right side of HVAC module. See Fig. 24.
Cooling Fan - Left	Behind left side of radiator. See Fig. 20.
Cooling Fan - Right	Behind right side of radiator. See Fig. 20.
Door Lock-Driver	Driver's door. See Fig. 8.
Door Lock-Front Passenger	Front passenger's door. See Fig. 9.
Door Lock-LR	Left rear door. See Fig. 10.
Door Lock-RR	Right rear door. See Fig. 11.
Fuel Pump & Sender Assembly	In fuel tank. See Fig. 12.
Ignition Lock Cylinder Control Actuator	Top of steering column. See Fig. 40.
Lumbar Motor (2)	Driver's seat back. See Fig. 54.
Magnasteer? Actuator	Steering rack assembly. See Fig. 41.
Mode Actuator	Lower left side of HVAC assembly. See Fig. 24.
Recirculation Actuator	Right side of HVAC assembly. See Fig. 24.
Seat Adjuster Motors Assembly - Driver	Under driver's seat. See Fig. 38.
Seat Adjuster Motors Assembly - Passenger	Under front passenger's seat. See Fig. 61.
Seat Lumbar Motor - Driver	Driver's seat back. See Fig. 38.
Secondary Air Injection Pump	Lower left rear of engine. See Fig. 17.
Starter (3.8L)	Lower left rear of engine. See Fig. 17.
Starter (5.3L)	Lower left rear of engine.
Sunroof Motor/Actuator (2)	Front of sun roof module. See Fig. 32.
Window Motor-Driver	Driver's door. See Fig. 8.
Window Motor-Front Passenger	Front passenger's door. See Fig. 9.
Window Motor-LR	Left rear door. See Fig. 10.
Window Motor (Right Rear) (4)	Right rear door. See Fig. 55.
Windshield Washer Pump	In washer fluid reservoir. See Fig. 42.
Windshield Wiper Motor	Left rear of engine compartment. See Fig. 42.

Buick LaCrosse CX 2009 - SENDING UNITS & SENSORS

Buick LaCrosse CX 2009 SENDING UNITS & SENSORS LOCATION

Component	Location
Accelerator Pedal Position (APP) Sensor (1)	Left side of dash. See Fig. 74.
A/C Refrigerant Pressure Sensor	On left side of engine compartment. See Fig. 23.
Air Temperature Sensor - Inside	Left side of dash. See Fig. 24.
Air Temperature Sensor - Lower Left	Behind HVAC control module.
Air Temperature Sensor - Lower Right	Behind HVAC control module.
Air Temperature Sensor - Upper Left	Center of dash. See Fig. 24.
Air Temperature Sensor - Upper Right	Center of dash. See Fig. 24.
Ambient Air Temperature Sensor	Center front of engine compartment. See Fig. 28.
Ambient Light Sensor	Center of dash. See Fig. 25.
Automatic Transmission Input Shaft Speed (A/T ISS) Sensor Assembly	In transmission assembly. See Fig. 5.
Battery Current Sensor	Near battery.
Brake Booster Vacuum Sensor (1)	On brake booster. See Fig. 73.
Brake Pedal Position Sensor (2)	Left side of dash. See Fig. 74.
Brake Pressure Sensor	Mounted on EBCM. See Fig. 1.
Camshaft Position (CMP) Sensor (3.8L)	Front of engine. See Fig. 19.
Camshaft Position (CMP) Sensor (5.3L)	Front of right cylinder head. See Fig. 82.
Crankshaft Position (CKP) Sensor (3.8L)	Lower left front of engine. See Fig. 19.
Crankshaft Position (CKP) Sensor (5.3L) (9)	Right rear of engine. See Fig. 72.
Engine Coolant Temperature (ECT) Sensor	Above left exhaust manifold.
Engine Coolant Temperature (ECT) Sensor (3.8L)	Top of engine. See Fig. 13.
Engine Coolant Temperature (ECT) Sensor (5.3L) (1)	Left front of engine. See Fig. 68.
Engine Oil Pressure (EOP) Sensor	Left front of engine.
Engine Oil Pressure (EOP) Sensor (3.8L)	Lower right front of engine. See Fig. 18.
Engine Oil Pressure (EOP) Sensor (5.3L) (6)	Top rear of engine. See Fig. 71.
Fuel Level Sensor	In fuel tank.
Fuel Tank Pressure (FTP) Sensor	In fuel tank. See Fig. 12.
Heated Oxygen Sensor (HO2S) 1 (3.8L)	Right side of engine. See Fig. 18.
Heated Oxygen Sensor (HO2S) 1 (5.3L) (7)	Right side of engine. See Fig. 72.
Heated Oxygen Sensor (HO2S) 2 (3.8L)	Downstream of catalytic converter. See Fig. 83.
Heated Oxygen Sensor (HO2S) 2 (5.3L)	Downstream of catalytic converter. See Fig. 84.
Inflatable Restraint Front End Sensor - Left	Left front of engine compartment. See Fig. 33.
Inflatable Restraint Front End Sensor - Right	Right front of engine compartment. See Fig. 33.
Inflatable Restraint Front Passenger Presence System (PPS) Sensor	Front passenger's seat bottom. See Fig. 61.
Inflatable Restraint Side Impact Sensor-Left	Driver's door. See Fig. 8.
Inflatable Restraint Side Impact Sensor-Right	Front passenger's door. See Fig. 9.
Knock Sensor (KS) 1 (3.8L)	Left front of engine. See Fig. 59.
Knock Sensor (KS) 2 (3.8L)	Below right exhaust manifold. See Fig. 18.
Knock Sensor (KS) 2 (5.3L) (8)	Lower right rear of engine. See Fig. 72.
Manifold Absolute Pressure (MAP) Sensor (3.8L)	Top right of intake manifold. See Fig. 13.
Manifold Absolute Pressure (MAP) Sensor (5.3L) (6)	Top left rear of engine. See Fig. 68.
Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor (3.8L)	In air intake tube. See Fig. 14.
Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor (5.3L)	In air intake tube. See Fig. 82.
Object Sensor - LR Corner	Left side of rear bumper. See Fig. 29.
Object Sensor - LR Middle	Middle of rear bumper. See Fig. 29.
Object Sensor - RR Corner	Right side of rear bumper. See Fig. 29.
Object Sensor - RR Middle	Middle of rear bumper. See Fig. 29.
Steering Angle Sensor (1)	Base of steering column. See Fig. 3.
Sunload Sensor Assembly	Center of dash. See Fig. 25.
Tire Pressure Monitor Sensor	Respective tire valve stems. See Fig. 63.
Transmission Fluid Temperature (TFT) Sensor	In transmission assembly. See Fig. 5.
Vehicle Speed Sensor (VSS) Assembly	Right side of transmission. See Fig. 5.
Wheel Speed Sensor (WSS)-LF	Left front wheel hub assembly. See Fig. 2.
Wheel Speed Sensor (WSS)-LR	Left rear wheel hub assembly. See Fig. 2.
Wheel Speed Sensor (WSS)-RF	Right front wheel hub assembly. See Fig. 2.
Wheel Speed Sensor (WSS)-RR	Right rear wheel hub assembly. See Fig. 2.
Yaw & Lateral Acceleration Sensor	Center console. See Fig. 4.

Buick LaCrosse CX 2009 - SOLENOIDS & SOLENOID VALVES

Buick LaCrosse CX 2009 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/C Compressor Clutch	Part of A/C compressor. See Fig. 23.
A/T Shift Lock Control Solenoid (1)	Center console. See Fig. 39.
Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 1	Front of right cylinder head.
Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2	Front of left cylinder head.
Camshaft Position (CMP) Actuator Solenoid - Intake Bank 1	Front of right cylinder head.
Camshaft Position (CMP) Actuator Solenoid - Intake Bank 2	Front of left cylinder head.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve	Top center of engine.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve (3.8L)	Top rear of engine. See Fig. 18.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve (5.3L)	Top right rear of engine. See Fig. 82.
Evaporative Emissions (EVAP) Canister Vent Solenoid Valve	Under left rear of vehicle. See Fig. 12.
Exhaust Gas Recirculation (EGR) Valve (3.8L)	Top right rear of engine. See Fig. 16.
Fuel Injector 1	Top right of engine. See Fig. 60.
Fuel Injector 1 (3.8L)	Top left of engine. See Fig. 13.
Fuel Injector 1 (5.3L) (13)	Top right of engine. See Fig. 71.
Fuel Injector 2	Top left of engine. See Fig. 60.
Fuel Injector 2 (3.8L)	Top right of engine. See Fig. 15.
Fuel Injector 2 (5.3L) (15)	Top right of engine. See Fig. 71.
Fuel Injector 3	Top right center of engine. See Fig. 60.
Fuel Injector 3 (3.8L)	Top left center of engine. See Fig. 13.
Fuel Injector 3 (5.3L) (11)	Top left of engine. See Fig. 71.
Fuel Injector 4	Top left center of engine. See Fig. 60.
Fuel Injector 4 (3.8L)	Top right center of engine. See Fig. 15.
Fuel Injector 4 (5.3L) (17)	Top right of engine. See Fig. 71.
Fuel Injector 5	Top right rear of engine. See Fig. 60.
Fuel Injector 5 (3.8L)	Top left rear of engine. See Fig. 13.
Fuel Injector 5 (5.3L) (9)	Top left of engine. See Fig. 71.
Fuel Injector 6	Top left rear of engine. See Fig. 60.
Fuel Injector 6 (3.8L)	Top right rear of engine. See Fig. 15.
Fuel Injector 6 (5.3L) (19)	Top right of engine. See Fig. 71.
Fuel Injector 7 (5.3L) (7)	Top left side of engine. See Fig. 71.
Fuel Injector 8 (5.3L) (2)	Top right of engine. See Fig. 71.
Pressure Control (PC) Solenoid Valve Assembly	In transmission assembly. See Fig. 5.
Secondary Air Injection (AIR) Control Solenoid Valve/Pressure Sensor, Bank 2 (3.8L)	Top of engine. See Fig. 62.
Starter Solenoid (3.8L)	On starter. See Fig. 59.
Starter Solenoid (5.3L)	On starter.
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve Assembly	In transmission assembly. See Fig. 5.
Valve Lifter Oil Manifold (VLOM) Assembly (11)	Top rear of engine. See Fig. 72.
1-2, 3-4 Shift Solenoid (SS) Valve Assembly	In transmission assembly. See Fig. 5.
2-3 Shift Solenoid (SS) Valve Assembly	In transmission assembly. See Fig. 5.

Buick LaCrosse CX 2009 - SWITCHES

Buick LaCrosse CX 2009 SWITCHES LOCATION

Component	Location
Brake Fluid Level Switch	On brake fluid reservoir. See Fig. 1.
Engine Oil Level Switch (3.8L)	Lower center front of engine oil pan. See Fig. 59.
Engine Oil Level Switch (5.3L) (10)	Lower center front of engine oil pan. See Fig. 72.
Hood Ajar Switch	Front of engine compartment. See Fig. 33.
Ignition Switch	Right side of steering column. See Fig. 40.
Lever Assembly - Manual Shaft Detent With Shift Position Switch - Internal Mode Switch (IMS)	In transmission assembly. See Fig. 5.
Park Brake Switch	On park brake assembly. See Fig. 27.
Seat Belt Switch - LF	Driver's seat belt buckle. See Fig. 36.
Seat Belt Switch - RF	Front passenger's seat belt buckle. See Fig. 37.
Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly	In transmission assembly. See Fig. 5.
Windshield Washer Fluid Level Switch	In washer fluid reservoir. See Fig. 42.

Buick LaCrosse CX 2009 - MISCELLANEOUS

Buick LaCrosse CX 2009 MISCELLANEOUS LOCATION

Component	Location
Audio Amplifier	Center of trunk. See Fig. 7.
Battery	Right front of engine compartment. See Fig. 58.
Data Link Connector (DLC)	Left side of dash. See Fig. 80.
Digital Radio Antenna	Center rear of roof. See Fig. 22.
Digital Radio Receiver	Left side of trunk. See Fig. 21.
Generator (3.8L)	Right rear of engine. See Fig. 15.
Generator (5.3L)	Top right front of engine. See Fig. 82.
Heated Seat Element - Driver Back	Driver's seat back. See Fig. 38.
Heated Seat Element - Driver Cushion	Driver's seat cushion. See Fig. 38.
Heated Seat Element - Passenger Back	Front passenger's seat back. See Fig. 61.
Heated Seat Element - Passenger Cushion	Front passenger's seat cushion. See Fig. 61.
Horn Assembly	Right front of vehicle. See Fig. 26.
Ignition Coil 1 (2)	Top of left valve cover. See Fig. 68.
Ignition Coil 2 (16)	Top of right valve cover. See Fig. 71.
Ignition Coil 3 (3)	Top of left valve cover. See Fig. 68.
Ignition Coil (3.8L)	Top right of engine, mounted on top of ignition control module (ICM).
Ignition Coil 4 (18)	Top of right valve cover. See Fig. 71.
Ignition Coil 5 (4)	Top of left valve cover. See Fig. 68.
Ignition Coil 6 20)	Top of right valve cover. See Fig. 71.
Ignition Coil 7 (5)	Top of left valve cover. See Fig. 68.
Ignition Coil 8 (1)	Top of right valve cover. See Fig. 71.
Inflatable Restraint Seat Belt Pretensioner - Left	Bottom of driver's seat. See Fig. 36.
Inflatable Restraint Seat Belt Pretensioner - Right	Bottom of front passenger's seat. See Fig. 37.
Inflatable Restraint Steering Wheel Module Coil	In steering column.
Navigation Antenna	Under center of rear package shelf. See Fig. 7.
Radio Rear Window Antenna	Center rear of roof. See Fig. 22.
Rear Compartment Lid Latch	In trunk lid.
Rear Parking Assist (RPA) Diagnostic Connector	Left side of trunk. See Fig. 31.
Seat Belt Pretensioner (Left) (1)	Under driver's seat. See Fig. 54.
Splice Pack (JX205)	Clipped to knee bolster panel, right of data link connector. See Fig. 80.
Splice Pack (JX307)	Body wiring harness, under passenger seat, at rear carpet. See Fig. 81.

Buick LaCrosse CX 2009 - CONNECTORS

Buick LaCrosse CX 2009 CONNECTORS LOCATION

Component	Location
X100 (3.8L) (Black, 20 Pin) (9)	Rear of engine. See Fig. 50.
X100 (5.3L) (Black/Gray, 20 Pin)	Top of transmission. See Fig. 77.
X101 (3.8L) (Gray, 20 Pin) (1)	Left rear of engine compartment. See Fig. 78.
X101 (5.3L) (Gray, 20 Pin)	Left rear of engine compartment. See Fig. 79.
X102 (3.8L) (Black, 4 Pin)	Left side of engine compartment. See Fig. 78.
X102 (5.3L) (Black, 4 Pin)	Left front strut tower. See Fig. 79.
X104 (3.8L) (Black, 2 Pin)	Right side of engine compartment. See Fig. 78.
X107 (Gray, 8 Pin)	Top of left valve cover. See Fig. 77.
X108 (3.8L) (Black, 1 Pin)	Right side of engine compartment. See Fig. 78.
X108 (5.3L) (Black, 1 Pin)	Right side of engine compartment. See Fig. 79.
X110 (Black, 8 Pin)	Top of engine. See Fig. 76.
X111 (Black, 5 Pin)	Near variable effort steering actuator. See Fig. 77.
X112 (Gray, 8 Pin)	Top of right valve cover. See Fig. 77.
X120 (3.8L) (Black, 6 Pin)	Right side of engine compartment. See Fig. 78.
X120 (5.3L) (Black, 6 Pin)	Right side of engine compartment. See Fig. 79.
X125 (Black, 1 Pin)	Under vehicle speed sensor (VSS).
X126 (Gray, 2 Pin)	Top of engine. See Fig. 76.
X141 (Black/Gray, 6 Pin) (4)	Behind left headlight. See Fig. 49.
X142 (Black/Gray, 6 Pin) (10)	Behind right headlight. See Fig. 49.
X143 (Black/Gray, 4 Pin) (5)	Behind left park/turn signal. See Fig. 49.
X144 (Black/Gray, 4 Pin) (11)	Behind right park/turn signal. See Fig. 49.
X200 (White, 20 Pin) (18)	Right kick panel. See Fig. 64.
X201 (Black, 40 Pin) (2)	Left side of dash. See Fig. 80.
X208 (Black, 10 Pin) (5)	Left side of dash. See Fig. 80.
X209 (Yellow, 4 Pin)	Left side of dash. See Fig. 80.
X210 (W/Electronic Controls) (Black, 12 Pin)	Behind radio. See Fig. 80.
X210 (W/O Electronic Controls) (Black, 2 Pin)	Behind radio. See Fig. 80.
X275 (Black, 8 Pin)	Behind left knee bolster.
X277 (Black, 8 Pin) (5)	In steering wheel. See Fig. 3.
X278 (Yellow, 4 Pin) (19)	Right kick panel. See Fig. 64.
X305 (Black, 3 Pin)	Right "C" pillar.
X311 (Black, 12 Pin) (12)	Under driver's seat. See Fig. 64.
X312 (Black, 4 Pin)	Under driver's seat. See Fig. 81.
X313 (Black, 16 Pin) (1)	Under front passenger's seat. See Fig. 81.
X315 (Yellow, 2 Pin)	Under front passenger's seat. See Fig. 81.
X316 (Yellow, 2 Pin) (9)	Under driver's seat. See Fig. 81.
X340 (Black, 2 Pin)	Under center console. See Fig. 81.
X341 (Black, 8 Pin)	Under center console. See Fig. 81.
X390 (Black, 16 Pin) (3)	Right rear of trunk. See Fig. 65.
X398 (Black, 6 Pin) (1)	Right front of headliner. See Fig. 32.
X399 (Black, 3 Pin) (4)	Left front of roof. See Fig. 51.
X400 (Black, 8 Pin)	Right side of trunk. See Fig. 65.
X401 (Black, 4 Pin)	Behind left rear lamp housing. See Fig. 65.
X402 (Black, 4 Pin)	Behind right rear lamp housing. See Fig. 65.
X405 (Black/Gray, 8 Pin)	Right front of trunk. See Fig. 65.
X406 (Black, 2 Pin) (7)	Behind left rear taillight. See Fig. 56.
X450 (Black, 8 Pin)	Behind right rear taillight. See Fig. 65.
X500 (Gray, 40 Pin)	Left kick panel. See Fig. 81.
X501 (Gray, 40 Pin) (6)	Driver's door. See Fig. 52.
X600 (Gray, 40 Pin)	Right kick panel. See Fig. 81.
X601 (Gray, 40 Pin) (5)	Front passenger's door. See Fig. 53.
X700 (Black/Gray, 9 Pin)	Left "B" pillar. See Fig. 81.
X800 (Black/Gray, 9 Pin)	Right "B" pillar. See Fig. 81.

Buick LaCrosse CX 2009 - GROUNDS

Buick LaCrosse CX 2009 GROUNDS LOCATION

Component	Location
G100	Right front of engine compartment. See Fig. 43.
G101	Left front of engine compartment. See Fig. 67.
G102 (3.8L)	Near battery. See Fig. 44.
G111 (3.8L)	Lower left rear of engine. See Fig. 44.
G112 (3.8L)	Top front of engine. See Fig. 45.
G112 (5.3L)	Left rear of engine. See Fig. 77.
G113 (3.8L)	Lower left rear of engine, near starter. See Fig. 76.
G113 (5.3L)	Left rear of engine. See Fig. 77.
G115 (3.8L)	Left rear of engine. See Fig. 76.
G115 (5.3L)	Left side of engine. See Fig. 77.
G200	Left side of dash. See Fig. 80.
G201	Center of dash. See Fig. 80.
G202	Left side of dash. See Fig. 80.
G301	Front of driver's door sill. See Fig. 48.
G302	Front of front passenger's door sill. See Fig. 81.

Buick LaCrosse CX 2009 - SPLICES

Buick LaCrosse CX 2009 SPLICES LOCATION

Component	Location
J101 (3.8L)	Engine wiring harness, 5 cm from breakout to PCM. See Fig. 76.
J101 (5.3L)	Engine harness, approximately 14 cm from starter connector breakout. See Fig. 77.
J102	Engine wiring harness, 5 cm from breakout to throttle body. See Fig. 76.
J105	Ignition coil wiring harness, approximately 6 cm from X107.
J106	Pre-engine wiring harness, 5 cm from ignition coil No. 1.
J107	Off-engine wiring harness, 6 cm from breakout to brake fluid pressure sensor.
J108	Engine wiring harness, approximately 5 cm from fuel injector 3. See Fig. 77.
J109 (3.8L)	Engine wiring harness, 8 cm from breakout to fuel injector 3. See Fig. 76.
J109 (5.3L)	Engine wiring harness, approximately 5 cm from breakout to fuel injector 4.
J111	Right front fascia jumper wiring harness, 5 cm from breakout to right park/turn signal lamp.
J112 (2)	Forward lamp harness, 19 cm from left front headlight assembly. See Fig. 49.
J113 (10)	Left front fascia jumper wiring harness, 5 cm from breakout to left park/turn signal lamp. See Fig. 50.
J114	Engine wiring harness, 20 cm from G115. See Fig. 76.
J115	Automatic transmission wiring harness, 19 cm from inline connector X100.
J116	Off-engine wiring harness, 39.5 cm from underhood fuse block.
J117	Engine wiring harness, approximately 5 cm from breakout to secondary air injection (AIR) pump relay. See Fig. 76.
J123	Forward lamp wiring harness, approximately 10 cm from breakout to X142. See Fig. 49.
J124 (13)	Forward lamp wiring harness, behind right headlight, 5 cm from breakout to X142. See Fig. 49.
J125	Engine wiring harness, approximately 5 cm from left front wheel speed sensor connector breakout. See Fig. 77.
J126	Right headlight wiring harness.
J127	Left headlight wiring harness.
J131	Engine wiring harness, 30.5 cm from G130.
J133	Engine wiring harness, 30.5 cm from G131.
J134	Ignition coil jumper harness, approximately 5 cm from X107.
J135	Ignition coil jumper harness, approximately 5 cm from X112.
J144	Ignition control module wiring harness, 12 cm from inline connector X110 breakout.
J145	Ignition control module wiring harness, 5.5 cm from inline connector X110.
J200	Steering column wiring harness, near ignition switch.
J201	I/P wiring harness, 4 cm from breakout to RCDLR.
J202	I/P wiring harness, approximately 4 cm from breakout to remote control door lock receiver.
J203	I/P wiring harness, 4 cm from second breakout from DLC connector.
J204	I/P wiring harness, 21 cm from lamp assembly switch.
J211	I/P wiring harness, 10 cm from breakout to data link connector.
J213	I/P wiring harness, 5 cm from breakout to data link connector.
J214	Steering column wiring harness.
J215	Steering column wiring harness.
J216	I/P wiring harness, 14 cm from pass-through to brake fluid level switch.
J231	Front floor console wiring harness, 13 cm from breakout to traction control switch.
J238	Front floor console wiring harness, 5 cm from breakout to traction control switch.
J280	Instrument panel harness, approximately 4 cm from second breakout from data link connector.
J303	Body wiring harness, 19 cm from breakout to G301. See Fig. 81.
J304	Left front door trim harness, 5 cm from breakout to door lock switch.
J305	Left front door wiring harness, 8.5 cm from breakout to window motor.
J307	Body wiring harness, 14.5 cm from breakout to G301.
J308	Overhead console wiring harness, approximately 2 cm from breakout to overhead console courtesy/reading lamp.
J309	Overhead console wiring harness, approximately 1 cm from breakout to overhead console courtesy/reading lamp.
J310	Overhead console wiring harness, approximately 10 cm from X399.
J314	Body wiring harness, 29 cm from second breakout to inline connector X311.
J315	Body wiring harness, 26 cm from second breakout to G301.
J317	Body wiring harness, 7 cm from breakout to audio amplifier.
J318	Body wiring harness, 31.5 cm from breakout to audio amplifier.
J330 (3)	Driver's seat wiring harness, 4.5 cm from breakout to seat belt switch. See Fig. 54.
J331 (6)	Driver's seat wiring harness, 4.5 cm from breakout to seat lumbar switch. See Fig. 54.
J333 (3)	Front passenger's seat wiring harness, 7 cm from breakout to seat belt pretensioner. See Fig. 66.
J350 (10)	Body wiring harness, 26 cm from breakout to G301. See Fig. 64.
J360	Body wiring harness, 90 cm from breakout to rear compartment courtesy lamp. See Fig. 65.
J361	Body wiring harness, 45 cm from breakout to rear compartment courtesy lamp. See Fig. 65.
J374	Front floor console wiring harness, 10 cm from breakout to head up display (HUD) switch.
J390	Headliner wiring harness, 20 cm from right courtesy/reading lamp breakout.
J393 (10)	Headliner wiring harness, 10 cm from right courtesy/reading lamp breakout. See Fig. 51.
J394 (9)	Headliner wiring harness, 20 cm from right courtesy/reading lamps. See Fig. 51.
J395	Sunroof wiring harness, 7.5 cm from sunroof motor.
J398 (11)	Headliner wiring harness, 7.5 cm from right courtesy/reading lamp breakout. See Fig. 51.
J400	Body wiring harness, approximately 5 cm from breakout to G302.
J401	License lamp harness, near left license lamp.
J402	License lamp harness, near left license lamp.
J406	Body wiring harness, 9 cm from breakout to inline connector X800. See Fig. 81.
J416	Rear compartment lid wiring harness, 13 cm from breakout to X404.
J450 (3)	RPA wiring harness, 7 cm from breakout for right object alarm sensor. See Fig. 56.
J451	RPA wiring harness, 7 cm from breakout for right object alarm sensor.
J500 (8)	Left front door wiring harness, 8.5 cm from breakout to window motor. See Fig. 52.
J501 (5)	Left front door trim harness, 5 cm from breakout to door lock switch. See Fig. 52.
J502 (4)	Left front door trim harness, 5 cm from breakout to door lock switch. See Fig. 52.
J604 (3)	Right front door wiring harness, 25.5 cm from breakout to inline connector X304. See Fig. 53.
J605 (6)	Right front door trim wiring harness, 5 cm from breakout to door lock switch. See Fig. 53.
J900	Left taillight wiring harness.
J901	Right taillight wiring harness.
J902	Left taillight wiring harness.
J903	Right taillight wiring harness.