Buick LaCrosse III (2016-2019) computer data lines system Wiring diagrams

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 BLU WIRE 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

BLK WIRE BLU WIRE BLU/GRY WIRE BLU/VIO WIRE BRN WIRE CLOSE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DOWN EXPRESS CLOSE EXPRESS DOWN EXPRESS OPEN EXPRESS UP FRONT OVERHEAD CONSOLE ASSEMBLY GRY WIRE HOT AT ALL TIMES LOGIC LT BLU WIRE ORG/ WIRE PNK WIRE PPL PPL/WHT WIRE RED/GRY WIRE RED/WHT WIRE SUNROOF FUSE SUNROOF MOTOR (FRONT CENTER OF ROOF) SUNROOF SUNSHADE MOTOR TAN WIRE UNDERHOOD FUSE BLOCK VIO WIRE WHT WIRE YEL WIRE

A/C COMP CLUTCH RLY CTRL A/C COMPRESSOR CLUTCH RELAY A/C REFRIGERANT PRESSURE SENS SIG ACC WAKEUP SERIAL DATA AERO SHUTTER FUSE AIR CONDITIONING SYSTEM AIR TEMP SENS SIG ANTI-THEFT SYSTEM APP LOW REF 1 APP LOW REF 2 APP SIG (1) APP SIG (2) BATT POS VOLT BATTERY FUSE BLOCK BLK/DK BLU WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/GRY WIRE BRK POS SENS LOW REF BRK POS SENS SIG BRK VACUUM SENS SIG BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FAN CTRL RELAY CTRL COOLING FANS SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRK SIG DATA OUT SIG DK BLU WIRE DK BLU/BLK WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM IGN FUSE ENGINE CONTROL MODULE ENGINE CONTROLS IGNITION RELAY ENGINE IND CTRL EVAP CANISTER VENT SOL CTRL EVAPORATIVE EMISSION VENT SOLENOID VALVE FUEL TANK PRESSURE SENS SIG FUSE 2 FUSED SPLY 1 FUSED SPLY 2 FUSED SPLY 3 GRY WIRE HI SPD GMLAN SERIAL DATA (+) (3) HI SPD GMLAN SERIAL DATA (-) (1) HOOD STATUS A SIG HOT AT ALL TIMES HUMIDITY SENS SIG IGN COIL FUSE LEFT CORNERING LAMP RELAY LT GRN/WHT WIRE MASS AIR FLOW SENS SIG PARK/NEUTRAL SIG (1) PWR/TRN OFF ENG FUSE PWR/TRN ON ENG FUSE RED/BRN WIRE RED/YEL WIRE RIGHT CORNERING LAMP RELAY RLY COIL CTRL RUN/CRANK IGN 1 VOLT SIG GND STARTER ENABLE RELAY CTRL STARTING/CHARGING SYSTEM TRANSMISSION CONTROL SYSTEM UNDERHOOD FUSE BLOCK VIO/DK BLU WIRE VIO/LT GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

A/C REFRIGERANT PRESSURE SENSOR ACCELERATOR PEDAL POSITION SENSOR ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 1 ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 2 AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/GRY WIRE BRAKE BOOSTER VACUUM SENSOR BRAKE PEDAL POSITION SENSOR BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BUS 21 COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/WHT WIRE FUSED GRY WIRE LOGIC LT GRN/VIO WIRE LT GRN/WHT WIRE RED/BRN WIRE RED/WHT WIRE SERIAL SPLY 6 VIO WIRE VIO/DK BLU WIRE VIO/LT GRN WIRE WHT WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL/RED WIRE YEL/VIO WIRE

BANK 1 SENSOR 2 HEATED OXYGEN SENSOR BANK 2 SENSOR 2 HEATED OXYGEN SENSOR BLK/BRN WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/WHT WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRK APPLY BRK APPLY SENS CTRL BRK APPLY SENS SIG BRN/GRY WIRE BRN/WHT WIRE CANISTER VENT SOL FUSE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE ECM IGN FUSE FUEL TANK PRESSURE SENSOR FUSE 9 GRY WIRE GRY/RED WIRE GRY/WHT WIRE HI SPD GMLAN HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL FUSE BLOCK LT GRN/WHT WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR NCA WIRE RED/BRN WIRE SENS LOW REF SERIAL DATA (-) (1) UNDERHOOD FUSE BLOCK VIO/DK BLU WIRE VIO/LT GRN WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/RED WIRE WHT/YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE YEL/WHT WIRE

BANK 1 SENS 1 BANK 1 SENS 2 BANK 2 SENS 1 BANK 2 SENS 2 BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/VIO WIRE BLU/WHT WIRE BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CTRL IND DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND ENGINE OIL IND ENGINE OIL LEVEL SWITCH ENGINE OIL PRESSURE SENSOR FUEL GAUGE FUEL IND FUEL LEVEL SENS SIG FUEL PRESSURE SENSOR FUSED SPLY 4 GRY/LT GRN WIRE GRY/WHT WIRE INSTRUMENT CLUSTER KNOCK SENS LIN BUS 21 LOGIC LOW REF (1) LOW REF 2 LOW SPD GMLAN SERIAL DATA 2 LT GRN/DK BLU WIRE LT GRN/VIO WIRE LT GRN/YEL WIRE MALFUNCTION IND NCA WIRE OIL LEVEL SW SIG OIL PRESSURE PRIMARY SEC SENS LOW REF SENS SIG THROTTLE THROTTLE SIG VIO/DK BLU WIRE VIO/GRY WIRE VIO/WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/DK BLU WIRE YEL/WHT WIRE