Buick LaCrosse I (2004-2009) ppl Wiring diagrams

-1 +2 10 VOLT REF 2-3 SOL VLV CTRL 32 23 55 P/N SIGNAL GMLAN SERIAL DATA GMLAN SERIAL DATA 6 14 DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) AUTOMATIC TRANSAXLE FLUID TEMPERATURE SENSOR AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR BRN WIRE CODE A CODE B CODE C DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (TOP OF ENGINE) GROUND GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT IN RUN OR START IGN 3 VOLTAGE ISS LOW SIG LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE P/N PARITY PNK WIRE PPL PPL VSS LOW SIG PC SOL VLV CTRL PRESSURE CONTROL SOLENOID VALVE RED WIRE RED/BLK WIRE SENSOR (RIGHT SIDE OF TRANSMISSION, NEAR RIGHT AXLE SHAFT) SERIAL DATA BUS (+) SERIAL DATA BUS (-) STOP LP SW SIG SW SIG TAN WIRE TCC 2-3 SOL SHIFT SHIFT VALVE SOL SOL VALVE VALVE TCC REL SW SIG TCC RELEASE SWITCH TCM FUSE 8 TERMINATOR RESISTOR TFT SENS SIG TRANS RANGE "B" TRANS RANGE "C" TRANS RANGE A LOW REF IGN 1 BATTERY TRANS SOL FUSE 21 TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION FLUID PRESSURE MANUAL VALVE POSITION SWITCH TRANSMISSION INPUT SHAFT SPEED SENSOR TRANSMISSION INTERNAL MODE SWITCH UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) VEHICLE SPEED WHT WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE CLASS 2 SERIAL DATA DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DK BLU WIRE DRIVER HEATED SEAT BACK ELEMENT (IN DRIVER'S SEAT BACK) DRIVER HEATED SEAT CUSHION ELEMENT (IN DRIVER'S SEAT CUSHION) DRIVER HEATED SEAT HIGH INDICATOR DRIVER HEATED SEAT LOW INDICATOR DRIVER HEATED SEAT SWITCH DRIVER'S HEATED SEAT RELAY (UNDER DRIVER'S SEAT FRONT PASSENGER HEATED SEAT HIGH INDICATOR FRONT PASSENGER HEATED SEAT LOW INDICATOR FRONT PASSENGER HEATED SEAT SWITCH GRY WIRE HEATED SEAT ELEMENT HEATED SEAT THERMISTOR HOT AT ALL TIMES HTD SEAT FUSE HVAC CONTROL MODULE (CENTER OF DASH) I/P FUSE BLOCK INFLATABLE RESTRAINT FRONT PASSENGER PRESENCE SYSTEM LOGIC LT GRN WIRE NCA WIRE ORG/ WIRE PASSENGER HEATED SEAT BACK ELEMENT (IN PASSENGER'S SEAT BACK) PASSENGER HEATED SEAT CUSHION ELEMENT (IN PASSENGER'S SEAT BACK) PASSENGER'S HEATED SEAT RELAY (UNDER PASSENGER'S SEAT) PNK WIRE PPL RED/WHT WIRE SPLICE PACK TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

31 57 OIL LVL SW SIG OIL PRESS SW BCM CLASS 2 SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DOOR LOCK AJAR INDICATOR SWITCH DRIVER DOOR LOCK DOOR (IN REAR SIDE OF DRIVER'S DOOR) LOCK AJAR INDICATOR SWITCH ENGINE CONTROLS SYSTEM ENGINE OIL LEVEL SWITCH (LOWER FRONT CENTER OF ENGINE OIL PAN) ENGINE OIL PRESSURE (EOP) SWITCH (BELOW POWER STEERING PUMP) FRONT PASSENGER DOOR LOCK (IN REAR SIDE OF FRONT PASSENGER'S DOOR) FUEL LEVEL SENSOR FUEL PUMP/ SENDER ASSEMBLY (IN FUEL TANK) GRY WIRE GRY/BLK WIRE I/P FUSE BLOCK (BEHIND RIGHT LEFT REAR DOOR LOCK (IN REAR SIDE OF LEFT REAR PASSENGER'S DOOR) LF DR AJAR SW SIG LOW REF LR DR AJAR SW SIG LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/BLK WIRE PARK BRAKE SW SIG PPL PPL FUEL LVEL SIG PPL/WHT WIRE REAR COMPARTMENT LID LATCH (IN REAR COMPT LID) REAR LID AJAR SW RED WIRE RED/BLK WIRE RF DR AJAR SW SIG RR DR AJAR SW SIG SERIAL DATA SIDE OF DASH) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE

4 3 2 1 VOLT (+) AJAR DOOR LOCK AJAR INDICATOR SWITCH BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CLASS 2 COAX ANTENNA SIG COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DOOR AJAR INDICATOR DOOR AJAR TRUNK AJAR DOOR LOCK ACTUATOR DOOR LOCK CYLINDER SWITCH DOOR LOCK OPEN INDICATOR SWITCH DR/LCK TRUNK FUSE DRIVER DOOR LOCK (IN REAR SIDE OF DRIVER'S DOOR) DRIVER DOOR LOCK SWITCH FRONT PASSENGER DOOR LOCK (IN REAR SIDE OF FRONT PASSENGER'S DOOR) FRONT PASSENGER DOOR LOCK SWITCH GRY WIRE GRY/BLK WIRE HORNS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INSTRUMENT PANEL CLUSTER (IPC) LEFT REAR DOOR LOCK (IN REAR SIDE OF LEFT REAR PASSENGER'S DOOR) LOCK LOCK UNLOCK LOGIC LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MESSAGE CENTER NCA WIRE ORG/ WIRE ORG/BLK WIRE PASSENGER SEAT, APPROXIMATELY 26 CM FROM SECOND PNK RFA SER DATA GROUND WIRE POWER DISTRIBUTION SYSTEM PPL REAR COMPARTMENT LID LATCH (IN REAR COMPT LID) RED WIRE RED/BLK WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) RFA/MOD FUSE RIGHT REAR DOOR LOCK (IN REAR SIDE OF RIGHT REAR PASSENGER'S DOOR) SECURITY INDICATOR TAN WIRE THEFT LED TOWARDS INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE) TRUNK AJAR INDICATOR UNLOCK W/ DIGITAL AUDIO SYSTEM WHT WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLU WIRE BRN WIRE DK BLU WIRE DK GRN WIRE DOWN DRIVER WINDOW MOTOR (CENTER OF DRIVER'S DOOR) DRIVER WINDOW SWITCH EXPRESS DOWN EXPRESS DOWN MODULE FRONT PASSENGER WINDOW MOTOR (CENTER OF FRONT PASSENGER'S DOOR) FRONT PASSENGER WINDOW SWITCH GRY WIRE HOT W/ RAP RELAY ENERGIZED I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) ILLUMINATION LEFT REAR WINDOW MOTOR (CENTER OF LEFT REAR PASSENGER DOOR) LEFT REAR WINDOW SWITCH LOCK OUT SWITCH LT BLU WIRE LT GRN WIRE PPL PWR/WNDW CIRCUIT BREAKER RIGHT REAR WINDOW MOTOR (CENTER OF RIGHT REAR PASSENGER DOOR) RIGHT REAR WINDOW SWITCH TAN WIRE TOWARDS INLINE UP DOWN UP ILLUM YEL WIRE

1 2 3 4 5 6 7 8 BATTERY GROUND F CENTER OUT (+) F CENTER OUT (-) 1 2 8 L AUDIO SIG AUDIO COMMON SIG DRAIN WIRE 1-6 AMPLIFIER CTRL ANTENNA GRID (CENTER REAR OF ROOF) ANTENNA MODULE AUDIO AMPLIFIER (CENTER OF REAR COMPT) BAND BARE BLK WIRE BLK/WHT WIRE BLU WIRE BLUNT CUT) BRN WIRE BRN/WHT WIRE CENTER OF REAR WINDOW PANEL, APPROXIMATELY 90 CM FROM BREAKOUT TO REAR COMPT CENTER SPEAKER CLASS 2 SERIAL DATA COAX 1 ANTENNA SIG RADIO ON SIG ANTENNA SIG PPL COAX COAX ANTENNA SIG COMPUTER DATA LINES SYSTEM COURTESY LAMP DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK LT LT DK GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING COLUMN) LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LT BLU WIRE LT DK LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PPL PPL ON SIG I/P LMP VLT GROUND 8 1450 INTERIOR LIGHTS SYSTEM PPL PPL R AUDIO SIG (+) L AUDIO SIG (+) AUDIO COMMON AUDIO COMMON SIG L AUDIO SIG RADIO RDO AMP FUSE REAR SUB OUT (-) REAR SUB OUT (+) REAR WINDOW RF SPKR OUT (+) RF SPKR OUT (-) LF SPKR OUT (-) LF SPKR OUT (+) RIGHT RIGHT FRONT FRONT DOOR TWEETER SPEAKER SPEAKER RIGHT STEERING WHEEL CONTROLS SATELLITE RADIO CIRCUIT SEEK DOWN SEEK UP SIDE OF DASH) SUB- MID SUB- MID WOOFER RANGE WOOFER RANGE RIGHT REAR LEFT REAR SPEAKER SPEAKER TAN WIRE VOL DOWN VOL UP WHT WIRE YEL WIRE

1 2 8 L AUDIO SIG AUDIO COMMON SIG DRAIN WIRE BAND BARE BLK/WHT WIRE BLU WIRE BLUNT CUT) BRN WIRE BRN/WHT WIRE CLASS 2 SERIAL DATA COAX ANTENNA SIG COAX PPL COAX ANTENNA SIG RADIO ON SIG ANTENNA SIG COMPUTER DATA LINES SYSTEM DK 1-6 DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DK LT GRID (CENTER REAR OF ROOF) GRN WIRE GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING COLUMN) LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PPL PPL ON SIG PPL PPL R AUDIO SIG (+) L AUDIO SIG (+) AUDIO COMMON AUDIO COMMON SIG L AUDIO SIG RADIO RADIO AMP FUSE REAR WINDOW ANTENNA RIGHT FRONT RIGHT FRONT LEFT REAR TWEETER DOOR SPEAKER SPEAKER SPEAKER RIGHT REAR SPEAKER RIGHT STEERING WHEEL CONTROLS SATELLITE RADIO CIRCUIT SEEK DOWN SEEK UP TAN WIRE VOL DOWN VOL UP YEL WIRE

12 VOLT REF 3.8L 3.6L BATTERY BATTERY POSITIVE REMOTE STARTER DISABLED CLASS 2 SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CLASS 2 SERIAL DATA CLSTR FUSE CRANK RELAY 48 CRANK VOLTAGE DK GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE HOLD- IN COIL HOOD AJAR SWITCH (W/ REMOTE KEYLESS ENTRY) (FRONT OF ENGINE COMPT) HOOD AJAR SWITCH SIG HOT AT ALL TIMES HOT W/ IGN 1 RELAY ENERGIZED I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGNITION SWITCH INSTRUMENT PANEL CLUSTER (IPC) LOCK LOGIC LT GRN WIRE ORG/ WIRE PCM FUSE 15 PNK IGNITION 1 VOLTAGE WIRE PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL PULL- IN COIL RED WIRE RUN WIRE SPLICE PACK START ENABLE RLY CTRL STARTER STARTER FUSE 33 UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK/WHT WIRE BRN WIRE CASE GROUND DK BLU WIRE DK GRN WIRE EARLY PRODUCTION GRY WIRE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER RIGHT FRONT SEAT) INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING COLUMN) LATE PRODUCTION LEFT INFLATABLE RESTRAINT FRONT END SENSOR LEFT INFLATABLE RESTRAINT ROOF RAIL MODULE (MOUNTED ON LEFT "C" PILLAR) LEFT INFLATABLE RESTRAINT SIDE IMPACT SENSOR (IN LOWER CENTER OF DRIVER'S DOOR) LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK OCCUPANT DATA LINK L SEAT BELT SW WIRE PNK WIRE PPL R SEAT BELT SW RED WIRE RIGHT INFLATABLE RESTRAINT FRONT END SENSOR (RIGHT FRONT OF ENGINE COMPT) RIGHT INFLATABLE RESTRAINT ROOF RAIL MODULE (MOUNTED ON RIGHT "C" PILLAR) SHORTING BAR STAGE 1 STAGE 2 TAN WIRE W/ SIDE IMPACT WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

AIR BAG IND AIRBAG OFF AIRBAG ON B+ SEAT BELT IND BATT MAIN 1 FUSE 26 BLK WIRE BLK/WHT WIRE CASE GROUND CLASS 2 (SDM) CLASS 2 SERIAL DATA DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DRIVER SEAT BELT SWITCH (IN SEAT BELT BUCKLE) GRN WIRE GROUND GRY WIRE HEATED SEAT SIG HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) IGNITION 1 INFLATABLE RESTRAINT FRONT PASSENGER PRESENCE SYSTEM (PPS) SENSOR INFLATABLE RESTRAINT PASSENGER AIR BAG ON/OFF INDICATOR INSTRUMENT PANEL CLUSTER (IPC) LEFT INFLATABLE RESTRAINT SEAT BELT PRETENSIONER (IN BOTTOM OF DRIVER'S SEAT) LOGIC LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PASSENGER SEAT BELT INDICATOR PASSENGER SEAT BELT SWITCH (IN BELT BELT BUCKLE) PNK WIRE PPL RED WIRE RELAY - FRONT PASSENGER) RFA/MOD FUSE SEATBELT IND SEATS SYSTEM SHORTING BAR SIR FUSE 9 UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE