Buick LaCrosse III (2016-2019) dk blu/yel Wiring diagrams

ABS VLV FUSE BATT POS VOLT BLK WIRE BLU/BLK WIRE BLU/VIO WIRE BRAKE FLUID LEVEL SWITCH BRAKE PRESSURE MODULATOR BRK FLUID LEVEL SENS SIG BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DK GRN/GRY WIRE DK GRN/VIO WIRE ELECTRONIC BRAKE CONTROL MODULE FUSE 3 GRY WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/RED WIRE GRY/WHT WIRE GRY/YEL WIRE HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED LEFT FRONT WHEEL SPEED SENSOR LEFT REAR WHEEL SPEED SENSOR LF WHEEL SPD SENS CTRL LF WHEEL SPD SENS SIG LR PARK BRK MTR APPLY CTRL LR PARK BRK MTR LO REF LR WHEEL SPD SENS CTRL LR WHEEL SPD SENS SIG MIL SS FUSE NCA WIRE PARK BRK APPLY SW SIG PARK BRK APPLY SW VOLT REF PARK BRK RELEASE SW SIG PARK BRK RELEASE SW VOLT REF PARK BRK SW SIG PARK BRK SW SUPPLY VOLT RED/YEL WIRE RF WHEEL SPD SENS CTRL RF WHEEL SPD SENS SIG RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR WHEEL SPEED SENSOR RR PARK BRK MTR APPLY CTRL RR PARK BRK MTR LO REF RR WHEEL SPD SENS CTRL RR WHEEL SPD SENS SIG RUN/CRANK IGN 1 VOLT SERIAL DATA COMMUNICATION ENABLE SHIFT INTERLOCK SYSTEM UNDERHOOD FUSE BLOCK VIO WIRE VIO/GRY WIRE WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/RED WIRE

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 BLK/BRN WIRE BLK/DK BLU WIRE BLK/DK GRN WIRE BLK/GRY WIRE BLK/VIO WIRE CHASSIS CONTROL MODULE (FRONT OF FLOOR CONSOLE) COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/RED WIRE DK BLU/YEL WIRE DK GRN/DK BLU WIRE DK GRN/RED WIRE DK GRN/VIO WIRE DRIVER INFORMATION CENTER DISPLAY FUSE 35 GROUND GRY/LT GRN WIRE HIGH SPD SER DATA (+) (1) HIGH SPD SER DATA (+) 2 HIGH SPD SER DATA (-) 1 LIN DATA BUS 26 HOT AT ALL TIMES IGN 1 VOLT INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LIN DATA BUS 26 LOGIC LOW SPD GMLAN SERIAL DATA 2 NCA WIRE RED/BLU WIRE REMOTE PRNDM ENABLE SENS 1 BETA SIGNAL SENS 2 ALPHA SIGNAL SENS 2 BETA SIGNAL SENS 2 LOW REF SENS 2 VOLT REF SHIFTER POSITION SW 1 RETURN SW 1 SIGNAL SW 2 RETURN SW 2 SIGNAL TRANSMISSION SHIFT LEVER TRANSMISSION SHIFT LEVER KNOB TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO/BLK WIRE VIO/BRN WIRE VIO/DK BLU WIRE VIO/DK GRN WIRE VIO/YEL WIRE VOLT REF WAKEUP SER DATA 2 WHT WIRE WHT/DK GRN WIRE WHT/GRY WIRE YEL/BRN WIRE YEL/DK BLU WIRE

ACC IGN VOLT ACC IND ADAPTIVE CRUISE CTRL GAP UP/DOWN SW SIG AMBIENT LIGHT SENS SIG ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES, CRUISE CONTROL, EXTERIOR LIGHTS SYSTEMS ANTI-THEFT SYSTEM BATTERY POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BRAKE APPLY SENS CTRL BRAKE APPLY SENS LOW REF BRAKE APPLY SENS SIG BRN WIRE BRN/BLK WIRE CHARGE IND CTRL COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DIMMER SW LO REF DIMMER SW SIG DIMMIMG IND DK BLU WIRE DK BLU/GRY WIRE DK BLU/RED WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BLK WIRE DK GRN/GRY WIRE DK GRN/VIO WIRE DK GRN/WHT WIRE DOOR LOCKS, ANTI-THEFT SYSTEMS ENGINE START/ STOP EXTERIOR LIGHTS, INTERIOR LIGHTS SYSTEMS FRT FOG LP SW SIG CTRL FUSE 18 FUSE 20 FUSE 21 FUSE 22 FUSE 29 FUSE 5 FUSE 8 GRN WIRE GROUND GRY WIRE GRY/VIO WIRE GRY/WHT WIRE HAZARD LED DIMMING SIGNAL HAZARD SW LEFT TURN SIG HAZARD SW RIGHT TURN SIG HAZARD SW SIG HDLP DIMMER SW HI BEAM SIG HDLP SW FLASH TO PASS SIG HORN SW SIG HDLP SW HDLP OFF SIG CTRL HDLP SW ON SIG HDLP SW PARK LAMPS SIG HEADLIGHTS SYSTEM HI SPD GMLAN SERIAL DATA (+) 1 REMOTE FUNCTION ACTR CTRL HI SPD GMLAN SERIAL DATA (+) 1 REMOTE FUNCTION ACTUATOR RECEIVE SIG HI SPD GMLAN SERIAL DATA (-) (1) HORNS SYSTEM HOT AT ALL TIMES IGN MODE SW ACC LED SIG IGN MODE SW START LED SIG IGNITION MODE SW MODE VOLT IGNITION MODE SWITCH INDICATOR DIMMING CTRL INSTRUMENT PANEL FUSE BLOCK KEYLESS ENTRY CONTROL MODULE LED BACKLIGHT DIMMING CTRL LIN BUS 15 LINEAR INTERCONNECT NETWORK SERIAL DATA BUS 4 LOW SPD GMLAN SERIAL DATA LT GRN WIRE PASSIVE START SW 2 LOW REF PASSIVE START SW SIG 2 POWER DISTRIBUTION SYSTEM RAP RLY COIL CTRL RED WIRE RED/BLU WIRE RED/BRN WIRE RED/DK GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE REMOTE FUNCTION ACTR TRANSMIT SIGNAL RUN/CRANK IGN 1 VOLT SECURITY INDICATOR CTRL SET/COAST/RESUME/ ACCELERATE SW SIG WINDSHIELD WIPER SW LOW REF START IND TRACTION CTRL SW SIG 1 TRANSMISSIONS SYSTEM UP/TAP DOWN SW SIG VIO WIRE VIO/BLK WIRE VIO/YEL WIRE WHT WIRE WINDSHIELD WASHER SW SIG WINDSHIELD WIPER SW HI SIG WINDSHIELD WIPER SW LOW SIG WIPER/WASHER SYSTEM YEL WIRE YEL/GRY WIRE

73 8 SIG GND ADAPTIVE CRUISE IND APP LO REF (1) APP LOW REF 2 APP SIG (1) APP SIG (2) BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRAKE APPLY SENS CTRL BRAKE APPLY SENS LOW REF BRAKE APPLY SENS SIG BRAKE PEDAL POSITION SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRAKE POS SENS LOW REF BRAKE POS SENS SIG BRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE IND CRUISE/ETC/TCC BRK SIG DATA 2 (+) DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER DISPLAY ECM IGN FUSE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) FUSE 20 FUSE 5 GMLAN GRY WIRE GRY/LT GRN WIRE HIGH SPD GMLAN SERIAL DATA (+) 1 HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPD LT GRN/WHT WIRE MAIN RELAY FUSED SUPPLY 2 RED WIRE RED/BRN WIRE RED/WHT WIRE RED/YEL WIRE RUN/CRANK IGN 1 VOLT SERIAL SERIAL DATA (-) (1) SET/COAST/RESUME/ ACCELERATE SW THROTTLE ACTUATOR CTRL CLOSE THROTTLE ACTUATOR CTRL OPEN THROTTLE POS SENS LOW REF THROTTLE POS SENS SIG UNDERHOOD FUSE BLOCK UP/DOWN SW SIG VIO/LT GRN WIRE WHT WIRE WHT/BLU WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

BATTERY FUSE BLOCK BATTERY POSITIVE VOLT BLK WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER DISPLAY FUSE 2 GROUND GRY/LT GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HOT AT ALL TIMES INSTRUMENT CLUSTER LOGIC LOW SPEED GMLAN SERIAL DATA 2 POWER STEERING CONTROL MODULE (ON STEERING GEAR) POWER STEERING MOTOR RED/LT GRN WIRE SERIAL DATA COMMUNICATION ENABLE WHT WIRE WHT/DK BLU WIRE

BATTERY POSITIVE VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLU/GRY WIRE BRN/GRN WIRE BRN/LT BLU WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER DISPLAY FT AXLE LEVEL SENS SIG FT LEVEL SENS LOW REF GMLAN SER DATA (-) (2) GMLAN SER DATA - (1) GRN/GRY WIRE GRY/LT BLU WIRE GRY/LT GRN WIRE GRY/VIO WIRE GRY/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT SHOCK ABSORBER ACTUATOR LEFT FRONT SUSPENSION POSITION SENSOR LEFT REAR SHOCK ABSORBER ACTUATOR LF DAMPING SERVO CTRL LOGIC LOW SPEED GMLAN SERIAL DATA 2 LR DAMPING SERVO CTRL NCA WIRE RED/GRN WIRE RF ACCEL LOW REF RF DAMPING SERVO CTRL RF WHEEL ACCEL SIG RIGHT FRONT SHOCK ABSORBER ACTUATOR RIGHT FRONT SUSPENSION POSITION SENSOR RIGHT REAR SHOCK ABSORBER ACTUATOR RR DAMPING SERVO CTRL RR HTD SEAT/ BSM/ESS FAN FUSE SERIAL DATA COMM ENABLE SUSPENSION CONTROL MODULE UNDERHOOD FUSE BLOCK WHT WIRE WHT/DK BLU WIRE WHT/RED 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

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