Buick LaCrosse III (2016-2019) blu Wiring diagrams

A/C PRESS SENS A/C REFRIGERANT PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR AIR TEMP SENS SIG AMBIENT AIR TEMPERATURE SENSOR BATT POS VOLT BATT POS VOLT COOLING FAN CTRL RELAY SPEED SIG BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/WHT WIRE BLU WIRE BLU/GRY WIRE BRN/RED WIRE CLUTCH RELAY CTRL COMPUTER DATA LINES SYSTEM COOL FAN FUSE DK BLU WIRE DK GRN WIRE EBOOST/COOL FAN LT FUSE ENG COOLANT TEMP SENS SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE SENSOR FUSE 9 GROUND HI SPEED GMLAN SERIAL DATA (-) 1 HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT COOLING FAN MOTOR (BEHIND LEFT SIDE OF RADIATOR) LOGIC NCA WIRE RED/BRN WIRE RED/YEL WIRE RELAY SPEED SIG RIGHT COOLING FAN MOTOR (BEHIND RIGHT SIDE OF RADIATOR) SENS LOW REF SIG GROUND UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLK WIRE WHT/GRY 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

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

BLK WIRE BLU WIRE DRIVER DOOR ACCENT LAMP DRIVER DOOR COURTESY LAMP DRIVER DOOR HANDLE FLOOD LAMP DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR LOCK SWITCH DRIVER DOOR PULL HANDLE FLOOD LAMP DRIVER EXTERIOR DOOR HANDLE ASSEMBLY DRIVER EXTERIOR DOOR HANDLE SWITCH DRIVER OUTSIDE REAR VIEW MIRROR DRIVER OUTSIDE REAR VIEW MIRROR COURTESY LAMP DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER WINDOW/ OUTSIDE REAR VIEW MIRROR SWITCH INTERIOR REAR COMPARTMENT LID UNLATCH SWITCH LEFT REAR DOOR ACCENT LAMP LEFT REAR DOOR HANDLE FLOOD LAMP LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR EXTERIOR DOOR HANDLE ASSEMBLY LEFT REAR EXTERIOR DOOR HANDLE SWITCH LEFT REAR WINDOW SWITCH LEFT TURN SIGNAL REPEATER LAMP PASSENGER DOOR ACCENT LAMP PASSENGER DOOR COURTESY LAMP PASSENGER DOOR HANDLE FLOOD LAMP PASSENGER DOOR LATCH ASSEMBLY PASSENGER DOOR LOCK SWITCH PASSENGER DOOR PULL HANDLE FLOOD LAMP PASSENGER EXTERIOR DOOR HANDLE ASSEMBLY PASSENGER EXTERIOR DOOR HANDLE SWITCH PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR COURTESY LAMP PASSENGER OUTSIDE REAR VIEW MIRROR GLASS PASSENGER WINDOW SWITCH RIGHT REAR DOOR ACCENT LAMP RIGHT REAR DOOR HANDLE FLOOD LAMP RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR EXTERIOR DOOR HANDLE ASSEMBLY RIGHT REAR EXTERIOR DOOR HANDLE SWITCH RIGHT REAR WINDOW SWITCH RIGHT TURN SIGNAL REPEATER LAMP W/ MEMORY W/O MEMORY

ACTR CTRL ACTR RECEIVE ACTR TRANSMIT AMBIENT LIGHT/SUNLOAD SENSOR BATT POSITIVE VOLT BLK WIRE BLU WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRN WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/BLK WIRE DR LCK ACTUATOR LCK CTRL DR LCK ACTUATOR LCK CTRL 2 DR LCK ACTUATOR UNLCK CTRL DRIVER DOOR LOCK SWITCH DRV DR LCK SW LCK SIG DRV DR LCK SW UNLCK SIG FRONT, REAR PARK ASSIST, LANE KEEP ASSIST FUSE 20 FUSE 41 GRY WIRE GRY/WHT WIRE HAZARD SW SIG HEADLAMP HI BEAM RLY CTRL HEADLIGHTS SYSTEM HOOD STATUS B SIG HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES IND DIMMING CTRL INSTRUMENT PANEL FUSE BLOCK INTERIOR LIFTGATE AJAR SW SIG 1 LIGHTS SYSTEM LR DR LCK MTR STATUS LT GRN WIRE PASS DR LCK SW LCK CTRL PASS DR LCK SW UNLCK CTRL PASSENGER DOOR LOCK SWITCH POWER SUPPLY TRANSFORMER REAR COMPARTMENT LID LATCH RED/BRN WIRE RED/YEL WIRE REMOTE CONTROL DOOR LOCK RECEIVER REMOTE FUNCTION ACTR CTRL REMOTE FUNCTION ACTR RECEIVE SIG REMOTE FUNCTION ACTR TRANSMIT SIG RR DR LCK MTR STATUS SECURITY IND CTRL SERIAL DATA (+) (3) SERIAL DATA (-) (1) SIG SPLY VOLT 1 VIO WIRE VIO/GRY WIRE W/ START/STOP SYSTEM W/ START/STOP SYSTEM W/O START/STOP SYSTEM WHT WIRE WHT/VIO WIRE YEL WIRE YEL/DK BLU WIRE YEL/DK GRN WIRE YEL/VIO WIRE

ACC IGN VOLT ACTIVE SIG ACTR CTRL ACTR RECEIVE ACTR TRANSMIT AMBIENT LIGHT/SUNLOAD SENSOR BATT POSITIVE VOLT BLK WIRE BLU WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRN WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DATA BUS 3 DK BLU WIRE DK GRN/YEL WIRE DR LCK ACTUATOR LCK CTRL DR LCK ACTUATOR LCK CTRL 2 DR LCK ACTUATOR UNLCK CTRL DRIVER DOOR LOCK SWITCH DRV DR LCK SW LCK SIG DRV DR LCK SW UNLCK SIG ENGINE CONTROL MODULE FUSE 20 FUSE 41 GRY WIRE GRY/WHT WIRE HAZARD SW SIG HEADLAMP HI BEAM RLY CTRL HEADLIGHTS SYSTEM HOOD AJAR SWITCH HOOD STATUS A SIG HOOD STATUS B SIG HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES IND DIMMING CTRL INSTRUMENT PANEL FUSE BLOCK INTERIOR LIFTGATE AJAR SW SIG 1 LIGHTS SYSTEM LOGIC LR DR LCK MTR STATUS LT GRN WIRE PASS DR LCK SW LCK CTRL PASS DR LCK SW UNLCK CTRL PASSENGER DOOR LOCK SWITCH PASSENGER WINDOW MOTOR PPL REAR COMPARTMENT LID LATCH RED/BRN WIRE RED/YEL WIRE REMOTE CONTROL DOOR LOCK RECEIVER REMOTE FUNCTION ACTR CTRL REMOTE FUNCTION ACTR RECEIVE SIG REMOTE FUNCTION ACTR TRANSMIT SIG GND RF DR AJAR RR DR LCK MTR STATUS RUN/CRANK IGN 1 VOLT SECURITY IND CTRL SERIAL DATA (-) (1) SIG SW SIG VIO WIRE VIO/BLK WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/VIO WIRE YEL WIRE YEL/DK BLU WIRE YEL/DK GRN WIRE YEL/VIO 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

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

ACTIVE NOISE CANCELLATION MODULE BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLU WIRE BRN/DK BLU WIRE DK BLU WIRE DK BLU/BLK WIRE DK GRN WIRE DK GRN/BLK WIRE GRN WIRE GRN/BLK WIRE GRN/BRN WIRE GRN/VIO WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LEFT REAR DOOR SPEAKER LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 LOW REF MICROPHONE 3 SIG REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE REMOTE ENABLE SIG REPLICATED SIG RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) RF SPEAKER SIG (-) 1 RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RR SPEAKER (+) CTRL RR SPEAKER CTRL (+) 1 RR SPEAKER SIG (-) SPEAKER (-) LOW REF VIO/DK BLU WIRE WHT WIRE YEL WIRE YEL/BLK 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