Buick LaCrosse I (2004-2009) splice pack Wiring diagrams

37 38 GMLAN SER DATA 46 29 TR SW B TR SW A AUTOMATIC TRANSMISSION BACKUP LAMP SPLY VOLT BATTERY VOLT BCM CLASS 2 SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CHMSL/ BKUP FUSE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE GMLAN SER DATA HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) LEFT BACK-UP LAMP LT BLU WIRE LT GRN WIRE ORG/ WIRE RED WIRE RIGHT BACK-UP LAMP SPLICE PACK TRANSMISSION INTERNAL MODE SWITCH (IMS) WHT WIRE YEL WIRE

AUTOMATIC TRANSMISSION BACKUP LAMP SPLY VOLT BATTERY VOLT BCM CLASS 2 SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CHMSL/ BKUP FUSE COMPUTER DATA LINES SYSTEM DK GRN WIRE HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) LEFT BACK-UP LAMP LT GRN WIRE ORG/ WIRE PCM CLASS 2 SERIAL DATA POWERTRAIN CONTROL MODULE (PCM) RED WIRE RIGHT BACK-UP LAMP SPLICE PACK TR SW A TR SW B TRANSMISSION INTERNAL MODE SWITCH (IMS) WHT WIRE YEL WIRE

3.6L 3.8L BATT + BATTERY BATTERY CURRENT SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE CHARGE INDICATOR CLSTR FUSE COMPUTER DATA LINES SYSTEM CURRENT SENSOR LOW REF CURRENT SENSOR SIG DK GRN WIRE ECM CLASS 2 SERIAL DATA ENGINE CONTROL MODULE (ECM) (TOP OF ENGINE) FUSIBLE LINK (8 GA- GENERATOR GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GROUND GRY WIRE HOT AT ALL TIMES I/P CLASS 2 SERIAL DATA I/P DIMMING VOLTAGE REF I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INSTRUMENT PANEL CLUSTER (IPC) LOGIC ORG/ WIRE PCM CLASS 2 SERIAL DATA PCM/ECM CLASS 2 SERIAL DATA POWER DISTRIBUTION SYSTEM POWERTRAIN CONTROL MODULE (PCM) RED (OR ORG) WIRE RED WIRE RED/WHT WIRE SPLICE PACK STARTER WHT WIRE

AMBIENT LIGHT SENSOR IND BACKUP LAMP SUPPLY VOLT BACKUP LAMP SUPPLY VOLTAGE BLK WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN/WHT WIRE BUTTON BACK LIGHTING CELLULAR MICRO PHONE SIGNAL DK GRN/WHT WIRE DRAIN WIRE EMERGENCY IND EMERGENCY SWITCH GROUND GRY WIRE HEADLIGHT SENSOR IND HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INSIDE REARVIEW MIRROR KEYPAD KEYPAD GREEN LED IND KEYPAD GREEN LED SIGNAL KEYPAD RED WIRE KEYPAD SIGNAL KEYPAD SUPPLY VOLTAGE LED SIGNAL LOGIC LT GRN WIRE LT GRN/BLK WIRE MAX MICRO PHONE NCA WIRE OFF MIN LOW HIGH ONSTAR IND ONSTAR KEYPAD ONSTAR SWITCH ORG/ WIRE PHONE IND PHONE SWITCH POWER TOPS SYSTEM RED LED IND WIRE S/ROOF FUSE SPLICE PACK W/ SUNROOF YEL WIRE YEL/BLK WIRE

30 48 43 STOP LAMP SW SIG RR STOP/TURN VOLT LR STOP/TURN VOLT 8 16 17 4 PARK LAMP ON SIG HAZARD SW SIG RIGHT TURN SW SIG LEFT TURN SW SIG ANTI-LOCK BRAKES, ENGINE CONTROLS SYSTEM ANTI-LOCK BRAKES, ENGINE CONTROLS, TRANSMISSIONS SYSTEMS BCM CLASS 2 SERIAL DATA BCM CLASS 2 SERIAL DATA IGN BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CHMSL/ BKUP FUSE COMPUTER DATA LINES SYSTEM DK BLU/WHT WIRE DK GRN WIRE DK LT DRIVER INFORMATION CENTER GRY WIRE HAZARD HAZRD FUSE HEAD HOT AT ALL TIMES HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN INSTRUMENT PANEL CLUSTER (IPC) IPC CLASS 2 SERIAL DATA LAMP SWITCH ASSEMBLY LEFT LEFT FRONT MARKER LAMP LEFT FRONT PARK/ TURN SIGNAL LAMP LEFT LICENSE LAMP LEFT TAIL/ STOP, TURN SIGNAL LAMP LEFT REAR LEFT TURN INDICATOR LOGIC LOWER UPPER LEFT LEFT TAIL LAMP TAIL LAMP LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MARKER LAMP ORG/ WIRE PARK AUTO OFF PRK LAMP FUSE PRK LAMP RELAY RIGHT RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/ TURN SIGNAL LAMP RIGHT LICENSE LAMP RIGHT REAR RIGHT TAIL/ STOP, TURN SIGNAL LAMP LOWER RIGHT TAIL LAMP UPPER RIGHT TAIL LAMP RIGHT TURN INDICATOR SPLICE PACK TAN WIRE TURN AUDIBLE INDICATOR TURN SIGNAL/ MULTI-FUNCTION SWITCH WHT WIRE YEL 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

1 3 2 SENSOR SIGNAL SUPPLY VOLTAGE LOW REFERENCE 2 3 1 LOW REFERENCE SUPPLY VOLTAGE SENSOR SIGNAL BACKUP LAMP SPLY VOLTAGE REAR PARKING DIAGNOSTIC SIG BACKUP LAMP SUPPLY VOLTAGE BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CENTER AMBER IND CENTER AMBER IND CTRL LEFT AMBER IND CTRL CHIME CONTROL CHIME CONTROL TELLTALE ASSEMBLY SPLY VOLTAGE DISPLAY FUSE 18 DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (3.6L) (TOP OF ENGINE) ENGINE CONTROLS SYSTEM GROUND IGN 1 VOLTAGE PNK WIRE GRY WIRE HOT W/ IGN 1 RELAY ENERGIZED I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IND LEFT AMBER IND LEFT REAR CORNER OBJECT SENSOR (LEFT SIDE OF REAR BUMPER) LEFT REAR MIDDLE OBJECT SENSOR (MIDDLE OF BUMPER) LT GRN WIRE ORG/ WIRE PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM REAR OBJECT SENSOR CONTROL MODULE (UNDER CENTER OF REAR WINDOW SHELF) REAR PARKING ASSIST (RPA) DIAGNOSTIC CONNECTOR (LEFT SIDE OF TRUNK) REAR PARKING ASSIST (RPA) DISPLAY RED IND CTRL WIRE RED WIRE RIGHT REAR CORNER OBJECT SENSOR (RIGHT SIDE OF REAR BUMPER) RIGHT REAR MIDDLE OBJECT SENSOR (MIDDLE OF REAR BUMPER) SPLICE PACK UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) VEHICLE SPEED SIG VSS SIG WHT WIRE 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

3.6L 3.8L BATTERY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CLASS 2 SERIAL DATA DELAY SWITCH DK GRN WIRE GRN WIRE GROUND GRY WIRE HIGH PPL HOT AT ALL TIMES IGN LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOW WASH INDICATOR LOW WASHER FLUID IND SIG LT BLU WIRE LT GRN WIRE MESSAGE CENTER LOW WASHER FLUID MESSAGE REQUEST MIST OFF ORG/ WIRE PARK SW SIG PARK SWITCH PNK WINDSHIELD WASHER SW SIG WIRE PNK WIRE PPL DK RED WIRE SPLICE PACK TAN WIRE TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WASHER PUMP CTRL WASHER SWITCH WASHER/ RVC FUSE 6 WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WIPER MOTOR (ON LEFT SIDE OF FIREWALL) WINDSHIELD WIPER SW HI SIG WINDSHIELD WIPER SW HIGH SIG WINDSHIELD WIPER SW LOW SIG WINDSHIELD WIPER SWITCH WIPER HI RELAY 44 WIPER RELAY 45 WIPER RLY CTRL WIPER/ WS FUSE 5 YEL WIRE