Buick LaCrosse II facelift (2013-2016) (bottom of left "a" pillar) Wiring diagrams

BLK WIRE BRN WIRE BRN/BLU WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER BACK SEAT HEATING ELEMENT (DRIVER'S SEAT BACK) DRIVER CUSHION SEAT BLOWER MOTOR (UNDER CENTER OF DRIVER CUSHION) DRIVER CUSHION SEAT HEATING ELEMENT (DRIVER'S SEAT CUSHION) DRV SEAT VENT MTR CTRL PASS SEAT VENT MTR CTRL FRONT SEAT HEATING CONTROL MODULE (BELOW FRONT CENTER OF DRIVER SEAT) GRN/BLU WIRE GRN/VIO WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HTD ST CO DR FUSE HTD ST DR FUSE IGN 1 VOLT LIN BUS 2 LOGIC MOTOR CTRL PASSENGER BACK SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT BACK) PASSENGER CUSHION SEAT BLOWER MOTOR (UNDER FRONT PASSENGER SEAT CUSHION) PASSENGER CUSHION SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT CUSHION) RED WIRE RED/GRY WIRE RED/YEL WIRE SEAT MASS FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/WHT WIRE W/O ADAPTIVE CRUISE CONTROL W/ ADAPTIVE CRUISE CONTROL WHT WIRE WHT/BRN WIRE

BLK WIRE BRN/WHT WIRE GROUND HEATED STEERING WHEEL IND HEATED STEERING WHEEL SWITCH HOT W/ IGNITION MAIN RELAY ENERGIZED HTD WHEEL FUSE IGN LEFT STEERING WHEEL CONTROLS SWITCH RED WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SENSOR SIG STEERING COLUMN FUSE HOLDER STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE (INSIDE STEERING WHEEL) SW LED CTRL SW SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLU WIRE VIO/BRN WIRE VOLT REF WHT/YEL WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 GROUND BATT POST VOLT WARNING IND SERIAL DATA (+) SERIAL DATA (-) SERIAL DATA BLK WIRE BLU WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ENABLE DISABLE SW SIG FRONTVIEW CAMERA MODULE GRN WIRE GRY/VIO WIRE GRY/WHT WIRE HOT AT ALL TIMES IND DIM CTRL INSTRUMENT CLUSTER INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LANE DEPARTURE WARNING IND LANE DEPARTURE WARNING SWITCH LRR LDW FUSE RADIO RED/GRY WIRE SERIAL DATA SERIAL DATA LOGIC UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) W/ ADAPTIVE CRUISE CONTROL WHT WIRE WHT/BLU WIRE WHT/GRN WIRE

BLK WIRE BLK/BLU WIRE BLU/GRN WIRE BLU/VIO WIRE BRN WIRE BRN/VIO WIRE BRN/WHT WIRE DOWN DOWN FWD DRIVER SEAT ADJUSTER SWITCH DRIVER SEAT LUMBAR SUPPORT PUMP DRIVER SEAT MEMORY SWITCH GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRY/BLK WIRE GRY/GRN WIRE MEM MEM SEAT SW SET SIG MEM SW LOW REF MEM SEAT SW SIG (1) RED/YEL WIRE RIGHT REAR HAPTIC SEAT MTR CTRL LEFT REAR HAPTIC SEAT MTR CTRL RWD RWD UP USED) VERTICAL MTR POS SNSR SIG RECLINE MTR POS SNSR SIG VIO WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/WHT WIRE

1 2 BATTERY POSITIVE VOLTAGE BATTERY POSITIVE VOLTAGE B+ FWD BLK WIRE BLU/VIO WIRE BLU/YEL WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DRIVER SEAT FRONT VERTICAL MOTOR (UNDER RIGHT FRONT CORNER OF DRIVER SEAT) DRIVER SEAT HORIZONTAL MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT LUMBAR SUPPORT VALVE ASSEMBLY DRIVER SEAT REAR VERTICAL MOTOR (UNDER RIGHT REAR CORNER OF DRIVER SEAT) DRIVER SEAT RECLINE MOTOR (LOWER RIGHT SIDE OF DRIVER SEAT BACK) DRVR/SEAT CIRCUIT BREAKER FRONT VERTICAL MTR DWN CTRL FRONT VERTICAL MTR UP CTRL GRN WIRE GRN/BRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE HORIZONTAL MTR FORWARD CTRL HORIZONTAL MTR REARWARD CTRL HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LINEAR INTERCONNECT NETWORK BUS 8 LOGIC LOW SPEED GMLAN SERIAL DATA 1 2 3 4 5 6 MEM ST FUSE REAR VERTICAL MTR DOWN CTRL REAR VERTICAL MTR UP CTRL RECLINE MTR FORWARD CTRL RECLINE MTR REARWARD CTRL RED/GRN WIRE RED/YEL WIRE RWD DN UP SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/WHT WIRE

1 2 SERIAL DATA (-) SERIAL DATA (+) AM/FM AUX AUDIO COM SIG AUX DET SIG BATT + BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE BUS 12 COAX COMPUTER DATA LINES SYSTEM CTRL GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HANG UP IND DIMMING INSTRUMENT CLUSTER LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF MOST CTRL NCA WIRE NETWORK NETWORK BUS 10 ORG/ WIRE ORG/VIO WIRE PNK 10 4 5 6 WIRE PNK WIRE RADIO RED/BLU WIRE RED/VIO WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH SEEK + MUTE SEEK+ VOL+ SERIAL DATA SIG SOURCE SPEAK SIG STEERING STEERING WHEEL AIR BAG COIL VIO WIRE VOICE LEFT VOICE SIG VOL (-) WHEEL SW WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 SERIAL DATA (-) SERIAL DATA (+) AM/FM AUX AUDIO COM SIG AUX DET SIG BATT + BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/DK BLU WIRE BRN/WHT WIRE BUS 12 COAX COAX 1 2 3 4 5 6 7 8 9 COMPUTER DATA LINES SYSTEM CTRL DK BLU WIRE DK BLU/BLK WIRE GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HANG UP IND DIMMIMG INSTRUMENT CLUSTER LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF LT FT SPKR 1+ LT FT SPKR SIG 1- LT GRN WIRE LT GRN/BLK WIRE LT RR SPKR LT RR SPKR SIG - MOST CTRL NCA WIRE NETWORK NETWORK BUS 10 ORG/ WIRE ORG/VIO WIRE PNK 10 4 5 6 WIRE PNK WIRE RADIO RED/BLU WIRE RED/VIO WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH RT FT SPKR 1+ RT FT SPKR SIG 1- RT RR SPKR RT RR SPKR SIG - SEEK SEEK+ VOL+ SERIAL DATA SIG SOURCE MUTE SPEAK SIG STEERING STEERING WHEEL AIR BAG COIL VIO WIRE VOICE LEFT VOICE SIG VOL (-) WHEEL SW WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 3 4 5 6 7 8 LEFT REAR CORNER OBJECT SENSOR LEFT REAR MIDDLE OBJECT SENSOR 1 2 3 4 5 6 7 B+ 8 9 10 11 12 REAR PARK ASSIST DISABLE SIGNAL BLK WIRE BLK/GRY WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DIM CTRL GRN WIRE GRN/BRN WIRE GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LEFT MIDDLE REAR OBJECT SENSOR (LEFT SIDE OF REAR BUMPER) LEFT OUTER REAR OBJECT SENSOR (LEFT SIDE OF REAR BUMPER) LOW REFERENCE LOW SPEED GMLAN SERIAL DATA GROUND OBST DETCT FUSE PARKING ASSIST CONTROL MODULE (CENTER OF REAR PACKAGE SHELF) PARKING ASSIST ON/OFF SWITCH RED/GRN WIRE RIGHT MIDDLE REAR OBJECT SENSOR (RIGHT SIDE OF REAR BUMPER) RIGHT OUTER REAR OBJECT SENSOR SUPPLY VOLT UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE YEL WIRE YEL/BLU WIRE YEL/VIO WIRE YEL/WHT WIRE

2-WAY POWER SEAT PASSENGER SEAT ADJUSTER SWITCH 7 8 9 10 11 12 PHASE B 8-WAY POWER SEAT BCM 3 MAIN FUSE FUSE BCM 7 BCM 4 FUSE FUSE BCM 8 FUSE BLK WIRE BLOWER MOTOR CONTROL MODULE BODY CONTROL MODULE BRN RED/ WIRE BRN WIRE BRN/BLU WIRE CENTER CONSOLE 1 ACCESSORY POWER RECEPTACLE CENTER CONSOLE 2 ACCESSORY POWER RECEPTACLE CENTER CONTROL COMPARTMENT ACCESSORY POWER RECEPTACLE DK BLU/WHT WIRE DK GRN/WHT WIRE DRIVER SEAT LUMBER SUPPORT PUMP DRIVER SEAT LUMBER SUPPORT VALVE ASSEMBLY DRIVER SEAT SEAT ADJUSTER MEMORY SWITCH CONTROL MODULE DRVR/SEAT CIRCUIT BREAKER FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 5) FROM DISPLAY FUSE (DIAGRAM 2 OF 5) FROM INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 5) FRT/HVAC/ BLWR FUSE GND 120 VAC GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/GRN WIRE GRY/VIO WIRE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INVERTER CTRL ACCESSORY DC/AC POWER INVERTER MODULE (BELOW CENTER CONSOLE) LOGIC LOGIS/ MODE FUSE ONSTAR/ UHP FUSE ORG/ WIRE PASS/SEAT CIRCUIT BREAKER PHASE B POWER RECEPTACLE PWR OUTLET 1 FUSE PWR OUTLET 2 FUSE PWR/ OUTLETS FUSE RDO FUSE REAR COMPARTMENT LID UNLATCH RELAY RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RETAINED ACCESSORY POWER RELAY RIGHT STEERING CONTROL SWITCH STEERING WHEEL AIR BAG COIL TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE TO SPLICE TRANSMISSION SHIFT LEVER POSITION INDICATOR TRUNK FUSE VIO WIRE W/O W/ MEMORY MEMORY YEL RED/ WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 B+ GND SW LOW REF BLK WIRE BLU WIRE BRN WIRE CLOSE COMPUTER DATA LINES SYSTEM DK BLU WIRE EXPRESS CLOSE EXPRESS OPEN GRN WIRE GRY WIRE HOT AT ALL TIMES INTERCONNECT BUS 1 SW DAT 1 LOGIC LT BLU WIRE RED/GRY WIRE RED/WHT WIRE SUNROOF CONTROL MODULE (BEHIND ROOF CONSOLE) SUNROOF FUSE SUNROOF SUNSHADE MOTOR MODULE (REAR OF SUNROOF) SUNROOF SUNSHADE SWITCH SUNROOF SWITCH SW SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) YEL WIRE