Buick LaCrosse III (2016-2019) (upper steering column) Wiring diagrams

ACCESSORY WAKEUP SERIAL DATA B+ VOLT BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BLK/YEL WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRAKE PEDAL POSITION SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRK APPLY SENS CTRL BRK APPLY SENS SIG BRK POS SENS 5 VOLT REF BRK POS SENS LO REF BRK POS SENS SIG COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DK GRN/DK BLU WIRE DK GRN/VIO WIRE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) FUSE 20 FUSE 5 FUSED SUPPLY 4 GROUND HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) 1 PARK/NEUTRAL SIG HIGH SPD SER DATA (+) (1) HIGH SPD SER DATA (+) 1 BRK APPLY SENS LOW REF HIGH SPD SER DATA (+) 2 HIGH SPD SER DATA (+) 2 BATT POS VOLT HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL FUSE BLOCK LEFT TRANSMISSION MANUAL SHIFT SWITCH LIN DATA BUS 26 LOGIC MIL SS FUSE PWR/TRN ON ENG FUSE RED/BRN WIRE RED/WHT WIRE RED/YEL WIRE REMOTE PRNDL ENABLE RIGHT TRANSMISSION MANUAL SHIFT SWITCH RUN/CRANK IGN 1 SIG GND STEERING WHEEL AIR BAG COIL SYSTEM TAP UP/TAP DOWN SW SIG TRANSMISSION RANGE CONTROL MODULE (TOP OF TRANSMISSION) TRCM FUSE UNDERHOOD FUSE BLOCK VIO/BLK WIRE VIO/DK BLU WIRE VIO/YEL WIRE WAKEUP SER DATA WHT WIRE WHT/GRY WIRE WHT/LT GRN WIRE WHT/RED WIRE

BLU/GRN WIRE BLU/GRY WIRE DATA DATA BUS 10 DATA BUS 12 DATA BUS 2 DATA BUS 5 DK BLU WIRE DK BLU/VIO WIRE DK BLU/YEL WIRE DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE GRY/LT GRN WIRE GRY/VIO WIRE HEAD-UP DISPLAY HI SPD GMLAN SERIAL DATA (+) 9 INFO DISPLAY MODULE INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT CLUSTER LOGIC LIN SERIAL LO SPD GMLAN LOGIC LOW SPD GMLAN LOW SPD GMLAN SERIAL DATA 2 LT GRN WIRE MEDIA DISC PLAYER MOST CONTROL MOST SERIAL RADIO RIGHT STEERING WHEEL CONTROLS SWITCH LOGIC SERIAL DATA 2 SERIAL DATA COMM ENABLE STEERING WHEEL AIR BAG COIL TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE VIO/YEL WIRE W/ INFOTAINMENT CONTROL TOUCHPAD W/ INFOTAINMENT CONTROL TOUCHPAD W/ ONSTAR W/O ONSTAR WHT WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE

ADAPTIVE CRUISE SWITCH AUTOMATIC TRANSMISSION ASSEMBLY BLK/BRN WIRE BLK/DK BLU WIRE BLK/RED WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE SWITCH DK BLU WIRE DK BLU/WHT WIRE FORWARD COLLISION ALERT WARNING SWITCH GAP SWITCH GRY WIRE GRY/GRN WIRE HIGH SPD GMLAN SERIAL DATA (+) 1 LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LT GRN/WHT WIRE NCA WIRE ON/OFF SWITCH OSS HIGH SIGNAL OSS LOW SIGNAL RED WIRE RED/WHT WIRE RES+ SET- STEERING WHEEL AIR BAG COIL TRANSMISSION CONTROL MODULE TRANSMISSION OUTPUT SHAFT SPEED SENSOR W/ ADAPTIVE CRUISE CONTROL W/O ADAPTIVE CRUISE CONTROL WHT WIRE WHT/RED WIRE YEL WIRE

A/C COMPRESSOR CLUTCH AIR IONIZER AUTOMATIC TRANSMISSION ASSEMBLY TRANSMISSION CONTROL MODULE BATTERY SAVER RELAY 1 BLK WIRE BLK/WHT WIRE BRN WIRE CENTER CONSOLE COMPARTMENT LAMP CENTER CONSOLE FLOOD LAMP DATA LINK CONNECTOR ENGINE CONTROL MODULE ENGINE OIL LEVEL SWITCH GRN/BLU WIRE HAZARD WARNING SWITCH HORN SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT PANEL COMPARTMENT LAMP INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH LEFT INSTRUMENT PANEL ACCENT LAMP LEFT INSTRUMENT PANEL COURTESY LAMP LEFT STEERING WHEEL CONTROLS SWITCH LEFT TRANSMISSION MANUAL SHIFT SWITCH MIDDLE INSTRUMENT PANEL ACCENT LAMP MULTI-FUNCTION INTAKE AIR SENSOR NCA WIRE PARK BRAKE CONTROL SWITCH PASSENGER PRESENCE MODULE RED WIRE RED/BLK WIRE RETAINED ACCESSORY POWER RELAY RIGHT INSTRUMENT PANEL ACCENT LAMP RIGHT INSTRUMENT PANEL COURTESY LAMP RIGHT STEERING WHEEL CONTROLS SWITCH RIGHT TRANSMISSION MANUAL SHIFT SWITCH STARTER RELAY STEERING COLUMN POSITION CONTROL MODULE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE TRANSMISSION RANGE CONTROL MODULE UNDERHOOD FUSE BLOCK

BLK WIRE BRN WIRE FUSE GROUND GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE HEATED STEERING WHEEL IND HEATED STEERING WHEEL SWITCH HOT W/ IGNITION MAIN RELAY ENERGIZED HTD WHL FUSE IGN INSIDE STEERING WHEEL) LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LT BLU WIRE ORG/ WIRE PNK SW LED CTRL WIRE PPL/BLU WIRE RED WIRE RED/BLK WIRE RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE SW SIG UNDERHOOD FUSE BLOCK VIO/GRY WIRE VOLT REF WHT WIRE YEL WIRE

AIR IONIZER AUTOMATIC TRANSMISSION ASSEMBLY AUXILIARY HEATER COOLANT PUMP RELAY BATTERY SAVER RELAY 1 BLK WIRE BLU/GRN WIRE BODY CONTROL MODULE CRN RT FUSE DATA LINK CONNECTOR DK GRN WIRE FROM EBOOST/ COOL FAN LT FUSE (DIAGRAM 2 OF 8) FROM FUSE 35 (DIAGRAM 7 OF 8) FROM FUSE 42 (DIAGRAM 7 OF 8) FRONT OVERHEAD CONSOLE ASSEMBLY FRT WPR FUSE FUSE 20 FUSE 21 FUSE 22 FUSE 23 FUSE 24 FUSE 25 FUSE 26 FUSE 29 FUSE 30 FUSE 31 FUSE 32 FUSE 33 FUSE 34 FUSE 41 GARAGE DOOR OPENER GRY/VIO WIRE HDLP LVL FUSE HVAC CONTROL MODULE LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HORIZONTAL MOTOR LEFT STEERING WHEEL CONTROLS SWITCH NCA WIRE PPL RAIN/ AMBIENT LIGHT SENSOR MODULE RED WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RIGHT CORNERING LAMP RELAY RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HORIZONTAL MOTOR RIGHT STEERING WHEEL CONTROLS SWITCH SECONDARY AIR INJECTION SOLENOID VALVE RELAY SERIAL DATA GATEWAY MODULE STEERING COLUMN LOCK MODULE STEERING WHEEL AIR BAG COIL TCM/ ECM FUSE TRANSMISSION CONTROL MODULE VIO WIRE VIO/LT BLU WIRE W/ ADAPTIVE CRUISE CONTROL WINDSHIELD WIPER MOTOR

8 WAY ABS VLV FUSE AUTOMATIC TRANSMISSION ASSEMBLY BLK WIRE BODY CONTROL MODULE CODRVR PWR SEAT FUSE DK BLU/VIO WIRE DK GRN/VIO WIRE ECM IGN FUSE ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROL MODULE ETRS IGN FUSE FROM WASH PUMP FUSE (DIAGRAM 2 OF 8) FUSE FUSE 3 HTD WHL FUSE IGNITION MAIN RELAY INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE KEYLESS ENTRY CONTROL MODULE PASSENGER PRESENCE MODULE PASSENGER SEAT ADJUSTER AUXILIARY SWITCH PASSENGER SEAT ADJUSTER SWITCH PEPS FUSE PPL/BLK WIRE REAR CLOSR FUSE REAR COMPARTMENT LID UNLATCH RELAY RED WIRE RED/DK BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE SADS FUSE STEERING COLUMN LOCK MODULE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATING CONTROL MODULE STR COL LOCK FUSE TCM/ IGN FUSE TO MIL SS FUSE (DIAGRAM 3 OF 8) TRANSMISSION CONTROL MODULE VIO/GRY WIRE VIO/LT GRN WIRE YEL WIRE

1-VT 2-VT BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE FUSE 31 GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER MENU MUTE NEXT RADIO CONTROLS RED WIRE RED/LT BLU WIRE RED/VIO WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SEEK DOWN SEEK UP SELECT SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 STEERING WHEEL AIR BAG COIL TALK USB VOL (-) W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE YEL WIRE

1-VT 2-VT BLK WIRE BLK/YEL WIRE BRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DK GRN/BLK WIRE FUSE 31 GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LOGIC MENU MUTE NEXT RED WIRE RED/VIO WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SEEK DOWN SEEK UP SELECT STEERING WHEEL AIR BAG COIL TALK USB VOL (-) WHT WIRE YEL WIRE

AIR BAG IND AIR BAG OFF IND AIR BAG ON IND BLK WIRE BLU WIRE BRN/ORG WIRE COMPUTER DATA LINES SYSTEM DK BLU/YEL WIRE DRIVER KNEE AIR BAG DRV KNEE MOD HI CTRL DRV KNEE MOD LO CTRL FRONT OVERHEAD CONSOLE ASSEMBLY GRN WIRE GRY WIRE GRY/LT GRN WIRE GRY/ORG WIRE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT CLUSTER LO REF LO SPD GMLAN LOGIC LOW SPD GMLAN SERIAL DATA LOW SPEED GMLAN SERIAL DATA LT GRN WIRE MOD STAGE 1 HI MOD STAGE 1 LO MOD STAGE 2 HI MOD STAGE 2 LO ORG/ WIRE ORG/BLU WIRE ORG/BRN WIRE ORG/GRN WIRE ORG/VIO WIRE ORG/WHT WIRE PASS KNEE MOD LO CTRL PASS STAGE 1 HI PASS STAGE 1 LO PASS STAGE 2 HI PASS STAGE 2 LO PASSENGER AIR BAG DISABLED INDICATOR PASSENGER KNEE AIR BAG PASSENGER PRESENCE MODULE PASSENGER SEAT BELT TENSION SENSOR RED WIRE RED/DK BLU WIRE RED/GRN WIRE SEAT BELT IND SEAT BELT IND PASS AIR BAG ON IND PASS AIR BAG OFF IND SEAT BELT ON IND SENS SIG SERIAL DATA SHORTING BAR STEERING WHEEL AIR BAG COIL VIO WIRE VIO/WHT WIRE WHT WIRE WHT/DK BLU WIRE WHT/ORG WIRE YEL WIRE YEL/ORG WIRE