Buick LaCrosse II facelift (2013-2016) gry Wiring diagrams

1 2 SERIAL DATA (-) SERIAL DATA (+) 8 7 6 5 4 3 2 1 BATT POS VOLT GROUND BLK WIRE BLU WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY DRIVER OUTSIDE REARVIEW MIRROR DRIVER SIDE OBJECT DETECTION INDICATOR DRIVER OUTSIDE REARVIEW MIRROR GLASS GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LED SIGNAL LEFT SIDE OBJECT SENSOR (BEHIND LEFT REAR WHEEL) LOGIC OBST DETCT FUSE PASSENGER OUTSIDE REARVIEW MIRROR RED/GRN WIRE RIGHT SIDE OBJECT SENSOR (BEHIND RIGHT REAR WHEEL) SERIAL DATA (-) SERIAL DATA (+) ENABLE 2 SERIAL DATA (-) SERIAL DATA (+) ENABLE 2 DET LED SIG LED SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT/GRN WIRE YEL WIRE YEL/VIO WIRE

AUXILIARY AUDIO INPUT BATT + BDY RC IGN FUSE BLK WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BUS 10 NETWORK BUS 5 NETWORK CAMERA SHIELD CAMERA SIG (-) CAMERA SIG 2 COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + EXTENSION GMLAN LOW SPD GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/VIO WIRE GRY/YEL WIRE HOT W/ IGNITION RELAY ENERGIZED HUMAN MACHINE INTERFACE CONTROL MODULE IGN 1 VOLT INFO DISPLAY MODULE LOGIC LOW REF MOST CTRL NAVIGATION NAVIGATION DISPLAY SIG NCA WIRE NETWORK BUS 5 RADIO CONTROLS REARVIEW CAMERA RED WIRE RED/BLU WIRE RED/VIO WIRE SERIAL DATA SERIAL DATA (-) (1) SPLY VOLT UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) USB VIO WIRE VIO/BLK WIRE VOICE AUD SIG WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL 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

AUXILIARY AUDIO INPUT BATT + BDY RC IGN FUSE BLK WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BUS 10 NETWORK BUS 5 NETWORK CAMERA SHIELD CAMERA SIG (-) CAMERA SIG 2 COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + EXTENSION GMLAN LOW SPD GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/VIO WIRE GRY/YEL WIRE HOT W/ IGNITION RELAY ENERGIZED HUMAN MACHINE INTERFACE CONTROL MODULE IGN 1 VOLT INFO DISPLAY MODULE LOGIC LOW REF MOST CTRL NAVIGATION NAVIGATION DISPLAY SIG NCA WIRE NETWORK BUS 5 RADIO CONTROLS REARVIEW CAMERA RED WIRE RED/BLU WIRE RED/VIO WIRE SERIAL DATA SERIAL DATA (-) (1) SPLY VOLT UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) USB VIO WIRE VIO/BLK WIRE VOICE AUD SIG WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL 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

2.4L 3.6L ABS PUMP FUSE ABS WDO FRT VALVE FUSE FUSE AFL MTR FUSE AMPLIFIER FUSE AUDIO AMPLIFIER (IF EQUIPPED) AUXILIARY HEATER COOLANT PUMP RELAY BATT RVC FUSE BCM 6 FUSE BATTERY BATTERY FUSE BLOCK (TOP OF BATTERY) BODY CONTROL MODULE BPIM BATT VES FUSE BRAKE BOOSTER PUMP MOTOR RELAY BRK VAC PUMP FUSE BRN WIRE CANN VENT FUSE CHASSIS CONTROL MODULE CONTROL SOLENOID VALVE ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY ECM BATT FUSE ELECTRONIC BRAKE CONTROL MODULE ELECTRONIC DRIVER BRAKE WINDOW CONTROL MOTOR MODULE ENGINE CONTROL MODULE EPB FUSE EVAPORATIVE EMISSION VENT SOLENOID VALVE FRONT SEAT HEATING CONTROL MODULE FSCM FUSE FUEL PUMP DRIVER CONTROL MODULE FUSE FUSE 2 FUSE 3 FUSE 4 FUSE 5 FUSE 6 GENERATOR GRN WIRE GRY WIRE HEADLAMP CONTROL MODULE (IF EQUIPPED) HTD ST DR FUSE KEYLESS ENTRY CONTROL MODULE LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HORIZONTAL MOTOR MEM ST FUSE MGU CLT PMP FUSE PARKING BRAKE CONTROL MODULE PASSENGER LEFT REAR WINDOW WINDOW SWITCH MOTOR PEPS FUSE POWER STEERING CONTROL MODULE (W/ BELT DRIVE) POWER STEERING CONTROL MODULE (W/ VARIABLE EFFORT) POWER STEERING CONTROL MODULE (W/O VARIABLE EFFORT OR BELT DRIVE) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HORIZONTAL MOTOR RIGHT REAR WINDOW SWITCH SEAT MEMORY CONTROL MODULE STARTER FUSE STARTER MOTOR STARTER RELAY STARTER/GENERATOR CONTROL MODULE HYBRID/EV BATTERY PACK SUNROOF CONTROL MODULE (IF EQUIPPED) SUNROOF FUSE SUNROOF SUNSHADE MOTOR MODULE (IF EQUIPPED) TCM BATT FUSE TO IGNITION MAIN RELAY (DIAGRAM 2 OF 5) AFL BATT FUSE TO INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 5) TO INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 3 OF 5) TRANSMISSION CONTROL MODULE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO RED/ WIRE W/ FRONT ACTIVE GRILLE SHUTTERS W/O FRONT ACTIVE GRILLE SHUTTERS W/ PASSIVE KEYLESS ENTRY W/ POWER W/O POWER STEERING STEERING CONTROL CONTROL WDO RR FUSE

3 OF 5) A/C CLUTCH FUSE A/C COMPRESSOR CLUTCH RELAY ACTIVE GRILLE AIR SHUTTER ACTUATOR (IF EQUIPPED) AIR QUALITY SENSOR (IF EQUIPPED) AUXILIARY BLOWER MOTOR CONTROL MODULE AUXILIARY HEATER COOLANT PUMP RELAY (2.4L) BCM 1 AIR BAG FUSE FUSE BCM 2 FUSE BDY RC IGN FUSE BLK WIRE BODY CONTROL MODULE BPIM IGN FUSE CABIN HTR COOL PMP FUSE COOL COOLING FAN HIGH SPEED RELAY DISPLAY FUSE DLIS DLC FUSE FUSE ECM FUSE ECM IGN FUSE IP RC IGN FUSE ENGINE CONTROL MODULE ENGINE CONTROLS IGNITION RELAY ENGINE HVAC CONTROL CONTROL MODULE MODULE FROM AFL BATT FUSE (DIAGRAM 1 OF 5) FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 5) FROM BODY CONTROL MODULE (DIAGRAM 5 OF 5) FROM MGU CLT PUMP FUSE (DIAGRAM 2 OF 5) FRONT FOG LAMP RELAY FRT WIPER FUSE FUSE GRN/VIO WIRE GRY WIRE HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY REAR DEFOGGER RELAY HORN RELAY HVAC TO CONTROL ACCESSORY MODULE DC/AC POWER INVERTER MODULE (DIAGRAM 3 OF 5) HVAC/ ACDC INV FUSE CNTRL FUSE IGNITION IGNITION COIL 2 COIL 4 IGNITION COIL 6 IGNITION MAIN RELAY INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INJ EVEN FUSE INSIDE REARVIEW REARVIEW MIRROR CAMERA INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) IPC FUSE MGU CLT PUMP FUSE MIL IGN FUSE OF BATTERY) PASSENGER AIR BAG DISABLED INSTRUMENT INDICATOR CLUSTER PASSENGER PRESENCE MODULE PUMP RELAY (DIAGRAM 2 OF 5) REAR HVAC/ BLWR FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE SAIR PUMP FUSE SAIR SOL FUSE SECONDARY AIR INJECTION PUMP RELAY (2.4L CALIFORNIA) SECONDARY AIR INJECTION SOLENOID VALVE RELAY (2.4L CALIFORNIA) START/ GENERATOR COOLANT PUMP RELAY (2.4L) STARTER/ GENERATOR CONTROL MODULE HYBRID/ EV BATTERY PACK TO IGNITION DATA LINK SWITCH CONNECTOR (DIAGRAM 5 OF 5) TO LOGIS/MODE FUSE (DIAGRAM TO MIR EWL FR FUSE (DIAGRAM 5 OF 5) TO SEAT MASS FUSE (DIAGRAM 4 OF 5) TO SPLICE TO WINDSHIELD WASHER TRANS AUX PUMP FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WINDSHIELD WINDSHIELD WIPER WASHER RELAY PUMP RELAY WINDSHIELD WIPER SPEED CONTROL RELAY

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

BDY RC IGN FUSE BLK WIRE BLU/ WHT WIRE CAMERA + SIG CAMERA - SIG GRN/WHT WIRE GROUND IGN 1 VOLT SPLY VOLT SHIELD EXTENSION CAMERA SIG CAMERA SIG + GRY WIRE GRY/YEL WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED HUMAN MACHINE INTERFACE CONTROL MODULE NCA WIRE REARVIEW CAMERA RED WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE WHT WIRE WHT/BLU WIRE