Buick LaCrosse III (2016-2019) (lower left end of dash) 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 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

AIR CONDITIONING SYSTEM AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR BATT POS VOLT BLK WIRE BLK/LT GRN WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/GRY WIRE FOG LAMP FUSE FOG LAMP RLY CTRL FRONT FOG LAMP RELAY FRONT FOG LAMP SW SIG FTP FUSE 18 GRN WIRE GROUND GROUND DISTRIBUTION SYSTEM GRY WIRE HDLP DIMMER SW HI BEAM SIG HDLP HI BEAM RLY CTRL HDLP LO BEAM RLY CTRL HDLP OFF SIG CTRL HDLP SW FLASH TO PASS SIG HDLP SW ON SIG HDLP SW PARK LAMP SIG HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY HI BEAM LT/RT FUSE HI SPD GMLAN SER DATA - HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP BALLAST LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LO BEAM HID LT FUSE LO BEAM HID RT FUSE LOW REF LT GRN WIRE NCA WIRE RED/GRY WIRE RED/YEL WIRE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK W/ ONSTAR W/O ONSTAR WHT WIRE YEL WIRE YEL/GRN WIRE

AUTO BATTERY FUSE BLOCK BLK WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DK BLU/GRY WIRE DRIVER INFORMATION CENTER DISPLAY FOG LAMP SWITCH FRONT FOG LAMP IND FUSE 2 GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/LT GRN WIRE HEAD PARK HEADLAMP SWITCH HIGH BEAM LAMP IND HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT FOG LAMP LOGIC LOW SPD GMLAN SER DATA NCA WIRE OFF OFF HEAD PARK RED/YEL WIRE RIGHT FRONT FOG LAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP BALLAST RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT LOW BEAM HEADLAMP WHT WIRE YEL 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

BATT POS VOLT BLK WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE FUSE 22 GRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRY WIRE GRY/BLK WIRE GRY/LT GRN WIRE HOOD AJAR SWITCH HOOD STATUS A SIG HOOD STATUS B SIG HOT AT ALL TIMES IMMOBILIZER CONTROL MODULE INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LO SPD GMLAN LOGIC NETWORK BUS 11 PPL RED/WHT WIRE SECURITY IND SERIAL DATA (-) (1) SERIAL DATA 2 VEH IMMOBILIZER CTRL VEH IMMOBILIZER LOW REF VEH SPLY VOLT W/ START/STOP SYSTEM WHT WIRE YEL WIRE

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

AUTO BATT POS VOLT BLK WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRAKE WARNING IND COMPUTER DATA LINES SYSTEM DATA BUS 3 DATA BUS 4 DK BLU WIRE DK GRN/GRY WIRE DK GRN/YEL WIRE DRIVER INFORMATION CENTER DISPLAY FRONT OVERHEAD CONSOLE ASSEMBLY FUSE 18 GRN WIRE GROUND GRY WIRE GRY/LT GRN WIRE HDLP OFF SIG CTRL HDLP SW ON SIG HDLP SW PARK LAMP SIG HEAD HEADLAMP SWITCH HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LOGIC LOW SPD GMLAN SER DATA 2 LR DR AJAR SW SIG OFF OFF HEAD PARK PARK AUTO PASSENGER AIR BAG DISABLED INDICATOR PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW MOTOR RED/GRY WIRE RF DR AJAR SW SIG SEAT BELT IND SEAT BELT ON IND TIRE PRESSURE IND VIO WIRE VIO/WHT WIRE WHT WIRE