Buick LaCrosse III (2016-2019) low ref Wiring diagrams

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

BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/YEL WIRE BLU WIRE BRN/BLK WIRE BRN/YEL WIRE COMMON CTRL COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DK BLU/DK GRN WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DOWN DRIVER OUTSIDE REAR VIEW MIRROR COURTESY LAMP DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR VIEW MIRROR MOTOR DRIVER OUTSIDE REAR- VIEW MIRROR DRIVER SEAT MEMORY SWITCH DRIVER SIDE OBJECT DETECTION INDICATOR DRIVER WINDOW/OUTSIDE REAR VIEW MIRROR SWITCH EXIT GRY/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES ILL LEFT LEFT TURN SIGNAL REPEATER LAMP LH (-) RH (+) SIG LIN DATA BUS 8 LOGIC LOW REF MIRROR DIMMING MIRRORS SYSTEM NAVIGATION SYSTEM RED/BLU WIRE RED/DK BLU WIRE RH (+) LH (-) CTRL RIGHT RWD SET- UNDERHOOD FUSE BLOCK UP (+) DOWN (-) CTRL UP DOWN SIG VIO/DK BLU WIRE VIO/RED WIRE WHT WIRE WHT/YEL WIRE WNDW MIR SEAT FUSE YEL WIRE YEL/BRN WIRE YEL/WHT WIRE

BATT POSITIVE VOLT BLK WIRE BLK/BLU WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLU WIRE BLU/GRN WIRE BLU/YEL WIRE BRN/YEL WIRE COMMON CTRL COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DK BLU/DK GRN WIRE DK GRN/WHT WIRE GRN/BLK WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/GRN WIRE LH (-) RH (+) SIG LIN DATA BUS 8 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA LIN BUS 8 LT GRN WIRE MEM SEAT SW SET SIG MEM SEAT SW SIG (1) MEM SW LOW REF NAVIGATION SYSTEM PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR COURTESY LAMP PASSENGER OUTSIDE REAR VIEW MIRROR GLASS PASSENGER OUTSIDE REAR VIEW MIRROR MOTOR PASSENGER SIDE OBJECT DETECTION INDICATOR PASSENGER WINDOW SWITCH RED/BLU WIRE RH (+) LH (-) CTRL RIGHT TURN SIGNAL REPEATER LAMP SEAT MEMORY CONTROL MODULE UP (+) DOWN (-) CTRL UP DOWN SIG VIO/WHT WIRE WHT WIRE YEL/RED WIRE YEL/VIO 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

AM/FM 1 AUXILIARY AUDIO INPUT BK USB BLK WIRE BLK/YEL WIRE BRN WIRE BU GPS COAX COAX BU GPS COAX GY GPS/CELL COAX PK GPS COAX VT GPS/CELL COMPUTER DATA LINES SYSTEM CU HD/XM DK GRN/DK BLU WIRE FM/RFR GRY/LT GRN WIRE GRY/VIO WIRE GY GPS LEFT STEERING WHEEL CONTROLS SWITCH LOCAL SERIAL DATA BUS 10 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA 2 MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) MUTE VOICE NAVIGATION ANTENNA SIGNAL SPLITTER (W/ CELL) (CENTER OF REAR WINDOW SHELF) NAVIGATION ANTENNA SIGNAL SPLITTER (W/O CELL) (CENTER OF REAR WINDOW SHELF) RADIO RADIO ANTENNA REAR ROOF ANTENNA RED/VIO WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER RFR TELEPHONE VOICE SIG USB W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE

AUDIO LOW REF AUDIO SIG + BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLUNT CUT) CAMERA SIG 2 CELL/CELL 1 CELLULAR PHONE MICROPHONE COAX COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM DK GRN/WHT WIRE FUSE 38 GMLAN SERIAL DATA (+) 9 GPS GPS/CELL 2 GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES HUMAN MACHINE INTERFACE CONTROL MODULE (RIGHT SIDE OF DASH) INFOTAINMENT DISPLAY SIG INSTRUMENT PANEL FUSE BLOCK LOW REF LT BLU WIRE LVDS MICROPHONE SIG MOST CONTROL MOST SERIAL DATA (+) NAVIGATION SYSTEM NCA WIRE REAR VIEW CAMERA CIRCUIT RECOGNITION AUDIO SIG RED WIRE RED/LT BLU WIRE RED/VIO WIRE RED/YEL WIRE SERIAL DATA (-) 9 SERIAL DATA BUS 5 SHIELD USB USB SERIAL DATA VOICE LOW REF VOICE SIG W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

AUDIO LOW REF AUDIO SIG + BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BRN/BLU WIRE CAMERA SIG 2 CELL/CELL 1 CELLULAR PHONE MICROPHONE COAX COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM DK GRN/WHT WIRE GMLAN SERIAL DATA (+) 9 GPS GPS/CELL 2 GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY/VIO WIRE GRY/YEL WIRE HUMAN MACHINE INTERFACE CONTROL MODULE (RIGHT SIDE OF DASH) INFOTAINMENT DISPLAY SIG LOW REF LT BLU WIRE LVDS MICROPHONE SIG MOST CONTROL MOST SERIAL DATA (+) NAVIGATION SYSTEM NCA WIRE REAR VIEW CAMERA CIRCUIT RECOGNITION AUDIO SIG RED WIRE RED/VIO WIRE RED/YEL WIRE SERIAL DATA (-) 9 SERIAL DATA BUS 5 USB USB SERIAL DATA W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

AM/FM 1 AUXILIARY AUDIO INPUT BK USB BLK WIRE BLK/YEL WIRE BRN WIRE COAX COAX BU GPS COAX GY GPS COAX COAX GY GPS/CELL COAX PK GPS COAX VT GPS/CELL COMPUTER DATA LINES SYSTEM CU HD/XM DK GRN/DK BLU WIRE FM/RFR GRY/LT GRN WIRE GRY/VIO WIRE LEFT STEERING WHEEL CONTROLS SWITCH LOCAL SERIAL DATA BUS 10 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA 2 MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) NAVIGATION ANTENNA SIGNAL SPLITTER (W/ CELL) (CENTER OF REAR WINDOW SHELF) NAVIGATION ANTENNA SIGNAL SPLITTER (W/O CELL) (CENTER OF REAR WINDOW SHELF) RADIO RADIO ANTENNA REAR ROOF ANTENNA RED/VIO WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER RFR TELEPHONE VOICE SIG USB USB USB W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE

AUDIO LOW REF AUDIO SIG + BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLUNT CUT) CAMERA SIG 2 CELL/CELL 1 CELLULAR PHONE MICROPHONE COAX COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM DK GRN/WHT WIRE GMLAN SERIAL DATA (+) 9 GPS GPS/CELL 2 GRY/VIO WIRE GRY/YEL WIRE HUMAN MACHINE INTERFACE CONTROL MODULE (RIGHT SIDE OF DASH) INFOTAINMENT DISPLAY SIG LOW REF LT BLU WIRE LVDS MICROPHONE SIG MOST CONTROL MOST SERIAL DATA (+) NAVIGATION SYSTEM NCA WIRE REAR VIEW CAMERA CIRCUIT RECOGNITION AUDIO SIG RED WIRE RED/VIO WIRE RED/YEL WIRE SERIAL DATA (-) 9 SERIAL DATA BUS 5 SHIELD USB USB SERIAL DATA VOICE LOW REF VOICE SIG W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

AUTOMATIC TRANSMISSION ASSEMBLY BATTERY BATTERY CURRENT SENSOR BATTERY FUSE BLOCK BLK WIRE BLK/GRY WIRE BLK/WHT WIRE BLU/GRN WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN/BLK WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) FUSE 1 FUSE 2 GMLAN SERIAL DATA GMLAN SERIAL DATA - 1 GRY WIRE GRY/LT GRN WIRE HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED IGN COIL FUSE IGNITION MODE SWITCH INSTRUMENT CLUSTER KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LO SPD GMLAN SERIAL DATA LOGIC LOW REF LOW SPEED LT GRN WIRE MAIN RLY FUSED SPLY 2 MODE VOLTAGE PARK/NEUTRAL SIG (1) PASSIVE START SW SIG 2 RED WIRE RED/YEL WIRE SIG GND STARTER ENABLE RELAY CTRL STARTER MOTOR STARTER RELAY STRTR MTR FUSE TRANSMISSION CONTROL MODULE TRANSMISSION PARK/ NEUTRAL SIG 1 UNDERHOOD FUSE BLOCK VIO WIRE VIO/DK BLU WIRE WHT WIRE WHT/GRY WIRE YEL WIRE YEL/BLK WIRE