Buick LaCrosse I (2004-2009) (below dash, bolted to dash carrier) Wiring diagrams

10 59 STOP SWITCH SIG SET/COAST RESUME/ ACCELERATE SIGNAL 10 VOLT REF 5 VOLT REFERENCE 1 PPL LOW REFERENCE 5 VOLT REFERENCE 2 LOW REFERENCE APP SENSOR 2 SIGNAL 55 54 15 8 31 39 TP SENS 1 SIG ACCELERATOR PEDAL POSITION (APP) SENSOR (ABOVE ACCELERATOR PEDAL) BAT POS VOL BCM CLASS 2 DATA BLK WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE CLSTR FUSE COMPUTER DATA LINES SYSTEM CRUISE CAN SW SIG CRUISE FUSE CRUISE INDICATOR CRUISE SET XX MPH CRUISE SWITCH DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (TOP OF ENGINE) GROUND DISTRIBUTION SYSTEM GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING COLUMN) INSTRUMENT PANEL CLUSTER (IPC) IPC CLASS 2 SER DATA LEFT STEERING WHEEL CONTROLS LOGIC LOW REF LT BLU WIRE LT GRN WIRE MESSAGE MESSAGE CENTER (UP LEVEL) NCA WIRE ON IND. ORG/ WIRE PCM CLASS 2 SER DATA PNK WIRE PPL REAR OBJECT SENSOR CONTROL MODULE RES+ SET- STOP LAMP SIG STOP SWITCH SIG TAC MTR CTRL 2 TP SENS 2 SIG TAC MTR CTRL 1 LOW REF PPL TAN WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE (AT THROTTLE BODY) TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) VEH SPD SIG VEHICLE SPEED SENSOR (VSS) VSS HIGH SIG VSS LOW SIG WHT WIRE WHT/BLK WIRE YEL WIRE

10 VOLT REF 32 22 44 STOP SWITCH SIG VEHICLE SPEED SIGNAL 5 VOLT REF ACCELERATOR PEDAL POSITION (APP) SENSOR (ABOVE ACCELERATOR PEDAL) APP SENS 1 SIG APP SENS 2 SIG BAT POS VOL BLK WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE CLSTR FUSE COMPUTER DATA LINES SYSTEM CRUISE CAN SW SIG CRUISE FUSE CRUISE INDICATOR CRUISE SET XX MPH DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING COLUMN) INSTRUMENT PANEL CLUSTER (IPC) IPC CLASS 2 SER DATA LEFT STEERING WHEEL CONTROLS LOGIC LOW REF LT BLU WIRE LT GRN WIRE MESSAGE MESSAGE CENTER (UP LEVEL) NCA WIRE ON IND. ORG/ WIRE ORG/BLK WIRE PCM CLASS 2 SER DATA PNK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF ENGINE COMPT, NEAR AIR CLEANER ASSEMBLY) PPL PPL LOW REF REAR OBJECT SENSOR CONTROL MODULE RES+ SER DATA PRIMARY SER DATA SECONDARY SET CRUISE SWITCH SET/COAST RESUME/ ACCELERATE SIGNAL STOP LAMP SIG STOP LAMP SW SIG STOP SWITCH SIG BCM CLASS 2 DATA LOW REF TAN WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE (AT THROTTLE BODY) UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) VEH SPD SIG VEHICLE SPEED SENSOR (VSS) VEHICLE SPEED SIGNAL VSS HIGH SIGNAL VSS LOW SIGNAL WHT WIRE WHT/BLK WIRE YEL WIRE

1715 1415 2144 1251 1356 94 524 192 1872 WIPER/WASHER SYSTEM 1732 690 1315 1314 80 17 1037 INTERIOR LIGHTS SYSTEM 244 17 DOOR LOCKS SYSTEM EXTERIOR LIGHTS SYSTEM 28 1439 1459 860 HORNS SYSTEM POWER DISTRIBUTION SYSTEM 295 294 550 440 19 DOOR LOCKS SYSTEM A/T SHFT LK CTRL SOL VOLT ANTI-THEFT SYSTEM EXTERIOR LIGHTS SYSTEM ANTI-THEFT SYSTEM WIPER/WASHER SYSTEM BATTERY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE BRN/WHT WIRE CHMSL/ BKUP FUSE COURTESY LAMPS SW ON SIG I/P DIMMING RET TRACTION CTRL SW SIG LOW REF DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR LOCKS SYSTEM NAVIGATION SYSTEM DR LCK/ TRUNK FUSE GRY WIRE GRY/BLK WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INT/ ILLUM FUSE HAZRD FUSE INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM DEFOGGER SYSTEM LR DOOR OPEN SW SIG RF DOOR AJAR SW SIG REAR DEFOG RLY CTRL LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PARK BRAKE SWITCH (ON PARK BRAKE ASSEMBLY) PASS DOOR LOCK SW LOCK SIG STOP LAMP SW SIG PNK PPL WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM PPL RED WIRE RED/BLK WIRE RED/WHT WIRE SEATS SYSTEM SHIFT INTERLOCK SYSTEM SHIFT INTERLOCK SYSTEM INTERIOR LIGHTS SYSTEM WIPER/WASHER SYSTEM TAN WIRE TAN/WHT WIRE WARNING SYSTEM EXTERIOR LIGHTS SYSTEM COMPUTER DATA LINES SYSTEM WHT WIRE WHT/BLK WIRE WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM EXTERIOR LIGHTS SYSTEM WIPER/WASHER SYSTEM HEADLIGHTS SYSTEM WIPER/WASHER SYSTEM YEL WIRE YEL/BLK WIRE

3.6L A/T SHIFT LOCK CONTROL PRNDL SOLENOID LAMP BLK WIRE BLU WIRE BODY CONTROL MODULE (BCM) DRIVER BACK DRIVER HEATED HEATED SEAT SEAT ELEMENT RELAY DRIVER DOOR LOCK DRIVER DRIVER SEAT SEAT BELT ADJUSTER SWITCH SWITCH ELECTRONIC RIGHT COMPASS LICENSE MODULE LAMP HORN SWITCH IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 IGNITION COIL 4 IGNITION COIL 5 IGNITION COIL 6 INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL LEFT BODY REAR CONTROL DOOR MODULE LOCK (BCM) LEFT REAR MARKER LAMP LEFT UPPER TAIL/STOP LEFT, TURN TAIL SIGNAL LAMP LAMP LOWER LEFT LEFT TAIL BACKUP LAMP LAMP NCA WIRE OUTSIDE DRIVER DOOR DRIVER REARVIEW LOCK WINDOW MIRROR SWITCH SWITCH SWITCH PASSENGER BACK PASSENGER HEATED HEAT SEAT SEAT ELEMENT RELAY PASSENGER SEAT ADJUSTER SWITCH PASSENGER SEAT BELT SWITCH REAR OBJECT SENSOR CONTROL MODULE REAR WINDOW DEFOGGER GRID W/ CONSOLE SHIFT W/ HEATED SEATS W/ PARK ASSIST W/ POWER SEATS W/O POWER SEATS W/O W/ POWER POWER SEATS SEATS WHT WIRE

BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) DK GRN WIRE GROUND DISTRIBUTION SYSTEM HORN ASSEMBLY (RIGHT FRONT OF VEHICLE) HORN FUSE 11 HORN RELAY 39 HORN RLY CTRL HORN SWITCH HOT AT ALL TIMES INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING COLUMN) NCA WIRE STEERING WHEEL) TAN WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER)

AUTO OFF AUTOMATIC A/C MANUAL A/C BATTERY CURRENT SENSOR (NEAR BATTERY) BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DRIVER DOOR LOCK SWITCH DRIVER INFORMATION CENTER (DIC) DRIVER WINDOW SWITCH FRONT PASSENGER DOOR LOCK SWITCH FRONT PASSENGER WINDOW SWITCH GROUND GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLK WIRE HEAD HOT AT ALL TIMES HVAC CONTROL MODULE (CENTER OF DASH) I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) I/P LAMP SUPPLY VOLTAGE ILLUM INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING COLUMN) INSTRUMENT PANEL CLUSTER (IPC) INT/ ILLUM FUSE LAMP SWITCH ASSEMBLY LEFT STEERING WHEEL CONTROLS (W/ ACCESSORY STEERING WHEEL CONTROL) LT GRN WIRE NCA WIRE ORG/ WIRE OUTSIDE REARVIEW MIRROR SWITCH PARK PARK LAMP SW ON SIG PNK WIRE PRNDL LAMP (CONSOLE SHIFT) RADIO RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS (W/ ACCESSORY STEERING WHEEL CONTROL) STR/WHL/ ILLUM FUSE SUPPLY

BATTERY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CHMSL/ BKUP FUSE DOOR LOCK AJAR INDICATOR SWITCH DR/LCK TRUNK FUSE DRIVER DOOR LOCK (IN REAR AJAR EXT LMPS OFF INPUT GRY WIRE GRY/BLK WIRE HAZRD FUSE HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGNITION SWITCH INT/ ILLUM FUSE KEY IN IGNITION LAMP SWITCH ASSEMBLY LEFT REAR DOOR LOCK AJAR LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE OFF HEAD ORG/ WIRE ORG/BLK WIRE PARK AUTO PARK BRAKE SWITCH (ON PARK BRAKE ASSEMBLY) SIDE OF DRIVER'S DOOR) SWITCH UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WASHER/ RVC FUSE 6