Buick LaCrosse III (2016-2019) red/brn Wiring diagrams

ABS IND. ACCESSORY WAKEUP SERIAL DATA BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/VIO WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRAKE BOOSTER VACUUM SENSOR BRAKE PEDAL POSITION SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRAKE WARNING IND BRK APPLY SENS CTRL BRK APPLY SENS LOW REF BRK APPLY SENS SIG BRK POS SENS 5 VOLT REF BRK POS SENS LO REF BRK POS SENS SIG BRK VACUUM SENS SIG BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE/ETC/TCC BRK SIG DK BLU WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ESC IND ESC OFF IND FUSE 20 FUSED SUPPLY 2 GRY/LT GRN WIRE GRY/RED WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH LOGIC PARK BRAKE CONTROL SWITCH (CENTER OF FLOOR CONSOLE) RED/BRN WIRE SIG GND TRACTION CONTROL OFF IND TRACTION CONTROL SWITCH TRACTION CTRL SW SIG 1 VIO/YEL WIRE WHT WIRE WHT/DK BLU WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

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

BATT POS VOLT BLK WIRE BLU/GRY WIRE BODY CONTROL MODULE COMPUTER DATA LINES SYSTEM FUSE 18 GMLAN SER DATA (+) 8 GRN/VIO WIRE GROUND GROUND DISTRIBUTION SYSTEM HDLP LVL FUSE HEADLAMP CONTROL MODULE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HORIZONTAL MOTOR LIN SER DATA BUS 6 LOGIC RED/BRN WIRE RED/GRY WIRE RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HORIZONTAL MOTOR SER DATA COMM ENABLE UNDERHOOD FUSE BLOCK WHT/DK BLU WIRE WHT/GRY WIRE

BATT POSITIVE VOLT BLK WIRE BLK/BLU WIRE BLK/DK BLU WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/GRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/DK GRN WIRE DK GRN/WHT WIRE DOWN DOWN SW SIG DRIVER SEAT MEMORY SWITCH EXIT FORWARD SW SIG FUSE 6 GRN/WHT WIRE GRY/VIO WIRE HOT AT ALL TIMES ILL INSTRUMENT PANEL FUSE BLOCK LIN SERIAL DATA BUS 8 LOW SPEED GMLAN SERIAL DATA LIN DATA BUS 8 LT BLU/YEL WIRE LT GRN WIRE LT GRN/BRN WIRE MEM SEAT SW SET SIG MEM SEAT SW SIG (1) MEM SW LOW REF MTR FORWARD CTRL MTR REARWARD CTRL REARWARD SW SIG RED WIRE RED/BLU WIRE RED/BRN WIRE RED/DK BLU WIRE RWD SEAT MEMORY CONTROL MODULE SET- STEERING COLUMN POSITION CONTROL MODULE STEERING COLUMN TELESCOPE MOTOR STEERING COLUMN TILT MOTOR STEERING COLUMN TILT, TELESCOPE SWITCH SW LOW REF TELESCOPE MTR LOW REF TELESCOPE MTR SIG TILT MTR DOWN CTRL TILT MTR LOW REF TILT MTR SIGNAL TILT MTR UP CTRL UNDERHOOD FUSE BLOCK UP SW SIG VIO/GRY WIRE WHT WIRE WHT/BLK WIRE WNDW MIR SEAT FUSE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE

ACTIVE NOISE CANCELLATION MODULE BATTERY BATTERY FUSE BLOCK BLOWER MOTOR BODY CONTROL MODULE DRIVER WINDOW MOTOR ENGINE CONTROL MODULE FUSE 1 FUSE 16 FUSE 17 FUSE 18 FUSE 2 FUSE 3 FUSE 4 FUSE 5 FUSE 6 FUSE 7 FUSE 8 FUSE 9 GENERATOR LEFT REAR WINDOW SWITCH PASSENGER WINDOW MOTOR POWER STEERING CONTROL MODULE RED WIRE RED/BRN WIRE RED/DK BLU WIRE RED/DK GRN WIRE RED/GRY WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR WINDOW SWITCH STARTER MOTOR STEERING COLUMN POSITION CONTROL MODULE TO INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 7 OF 8) TO REAR BODY FUSE BLOCK (DIAGRAM 4 OF 8) TO UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 8) WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH RELAY A/C HEV FUSE ACC IGN VOLT ACC IND ACC LED SIG BLK WIRE BLK/GRY WIRE BODY CONTROL MODULE BRN/BLK WIRE CHARGE IND CTRL COOL FAN FUSE DC DC BATT 2/AWD FUSE DK BLU/BLK WIRE DK BLU/LT GRN WIRE DK GRN/BLK WIRE EBOOST/COOL FAN LT FUSE ENGINE CONTROLS IGNITION RELAY ENGINE START/ STOP FOG LAMP FUSE FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 8) FROM MOBILE DEVICE WIRELESS CHARGER MODULE (DIAGRAM 5 OF 8) FRONT FOG LAMP RELAY FUEL MDL FUSE FUEL PUMP DRIVER CONTROL MODULE GRN WIRE GRY WIRE HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY HORN RELAY IGNITION MODE SWITCH ILL KEYLESS ENTRY CONTROL MODULE LEFT COOLING FAN MOTOR LOW REFERENCE LT GRN WIRE NCA WIRE REAR DEFOGGER RELAY REAR DIFFERENTIAL CLUTCH CONTROL MODULE REAR WINDOW WASHER PUMP RELAY RED/BRN WIRE RED/DK BLU WIRE RED/GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RIGHT COOLING FAN MOTOR RR HTD SEAT/ BSM/ESS FAN FUSE RUN/CRANK IGN 1 VOLT START IND START LED SIG START SW SIG 2 STARTER RELAY SUSPENSION CONTROL MODULE SW MODE VOLT TO FRT HEATED SEAT FUSE (DIAGRAM 4 OF 8) TO FUSE 27 (DIAGRAM 5 OF 8) TO IGNITION MAIN RELAY (DIAGRAM 8 OF 8) TO RETAINED ACCESSORY POWER RELAY (DIAGRAM 5 OF 8) TO TCM/ ECM FUSE (DIAGRAM 6 OF 8) TO WNDW MIR SEAT FUSE (DIAGRAM 3 OF 8) TRANSMISSION RANGE CONTROL MODULE TRCM FUSE VIO/BLK WIRE VIO/YEL WIRE WASH PUMP FUSE WINDSHIELD WASHER PUMP RELAY YEL WIRE YEL/GRN WIRE

CANISTER VENT SOL FUSE DRIVER SEAT ADJUSTER SWITCH DRIVER SEAT LUMBAR SUPPORT PUMP DRIVER SEAT MASSAGE SWITCH DRVR PWR SEAT FUSE EVAPORATIVE EMISSION VENT SOLENOID VALVE FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 8) FROM HEADLAMP HIGH BEAM RELAY (DIAGRAM 2 OF 8) FRONT FOG LAMP RELAY FRONT SEAT HEATING CONTROL MODULE FRT HEATED SEAT FUSE FUSE 1 FUSE 10 FUSE 11 FUSE 12 FUSE 13 FUSE 14 FUSE 15 FUSE 16 FUSE 17 FUSE 18 FUSE 19 FUSE 2 FUSE 21 FUSE 22 FUSE 24 FUSE 25 FUSE 26 FUSE 27 FUSE 28 FUSE 3 FUSE 31 FUSE 33 FUSE 34 FUSE 35 FUSE 38 FUSE 39 FUSE 4 FUSE 40 FUSE 41 FUSE 42 FUSE 5 FUSE 6 FUSE 7 FUSE 8 FUSE 9 PASSENGER SEAT LUMBAR SUPPORT PUMP PASSENGER SEAT MASSAGE SWITCH REAR SEAT HEATING CONTROL MODULE RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SEAT MEMORY CONTROL MODULE SUNROOF FUSE SUNROOF MOTOR W/ FRONT SEAT HEATER W/ MASSAGE SEAT CONTROL W/ MASSAGE SEAT CONTROL, FRONT SEAT HEATER

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

BATTERY POSITIVE VOLT BLK WIRE BLK/YEL WIRE BLU/BLK WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DK GRN/WHT WIRE DOWN SWITCH SIGNAL FORWARD SWITCH SIGNAL FUSE 6 GROUND GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LIN SERIAL DATA BUS 8 LOW REF LT BLU/YEL WIRE LT GRN/BRN WIRE REARWARD SWITCH SIGNAL RED/BRN WIRE STEERING COLUMN POSITION CONTROL MODULE STEERING COLUMN TELESCOPE MOTOR STEERING COLUMN TILT MOTOR STEERING COLUMN TILT, TELESCOPE SWITCH TELESCOPE MOTOR FORWARD CTRL TELESCOPE MOTOR LOW REF TELESCOPE MOTOR REARWARD CTRL TELESCOPE MOTOR SIGNAL TILT MOTOR DOWN CTRL TILT MOTOR LOW REF TILT MOTOR SIGNAL TILT MOTOR UP CTRL UP SWITCH SIGNAL VIO/GRY WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE

BATTERY POSITIVE VOLT BLK WIRE BLU WIRE BLU/ORG WIRE BLU/WHT WIRE COMPUTER DATA LINES SYSTEM DC DC BATT 2/AWD FUSE DIFFERENTIAL CLUTCH PUMP (UNDER REAR OF VEHICLE ON DIFFERENTIAL) DK BLU WIRE DK BLU/YEL WIRE HI CTRL SIG HI SPD GMLAN DATA BUS (+) 1 BATTERY POSITIVE VOLT HI SPD GMLAN DATA BUS (+) 1 GND HI SPD GMLAN DATA BUS (+) 2 HI SPD GMLAN DATA BUS (-) 1 HOT AT ALL TIMES LOW REF (1) LOW REF 2 PPL PPL/WHT WIRE REAR DIFFERENTIAL CLUTCH CONTROL MODULE REAR DIFFERENTIAL CLUTCH SOLENOID VALVE RED WIRE RED/BLK WIRE RED/BRN WIRE RED/DK BLU WIRE RED/DK GRN WIRE RED/WHT WIRE RR HTD SEAT/ BSM/ESS FAN FUSE SERIAL DATA COMM ENABLE SIG (1) SIG (2) SIG 3 SPLY VOLT PPL LOW REF U PHASE UNDERHOOD FUSE BLOCK V PHASE W PHASE WHT WIRE WHT/BLK WIRE WHT/DK BLU WIRE WHT/ORG WIRE