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

ACCESSORY WAKEUP SERIAL DATA BACKUP LAMP CTRL BATTERY BATTERY CURRENT SENSOR BATTERY FUSE BLOCK BATTERY POSITIVE VOLTAGE BLK WIRE BLK/VIO WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/WHT WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRN WIRE BRN/DK GRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COURTESY LAMP SW SIG CRUISE CONTROL SYSTEM CURRENT SENS CTRL CURRENT SENS LOW REF CURRENT SENS SIG DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/BRN WIRE DK GRN/VIO WIRE DK GRN/YEL WIRE DOME LAMP OFF INDICATOR CTRL DOOR LOCKS, ANTI-THEFT SYSTEMS DR LCK ACTUATOR UNLOCK CTRL DR LOCK ACTUATOR LOCK CTRL DR LOCK ACTUATOR LOCK CTRL 2 DRV DR LOCK SW LOCK SIG DRV DR LOCK SW UNLOCK SIG DRV OUTSIDE REAR VIEW MIRR PUDDLE LAMP CTRL FOG LAMP RLY CTRL LIFT GLASS/REAR COMPT LID FUSE 4 GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/YEL WIRE HDLP HIGH BEAM RLY CTRL HEADLAMP LOW BEAM RLY CTRL HEADLIGHTS SYSTEM HI SPD GMLAN SERIAL DATA (-) (1) HI SPEED GMLAN DATA BUS (-) HOOD STATUS B SIG HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES INADVERTENT POWER CTRL INTERIOR LAMP CTRL INTERIOR LAMP DEFEAT SW SIG PPL LOGISTIC MODE RLY OPEN CTRL LED AMBIENT LIGHTING CTRL 1 LED BACKLIGHT DIMMING CTR LEFT CORNERING LAMP RLY CTRL LEFT PARK LAMP CTRL LEFT REAR DR LOCK MTR STATUS LEFT REAR STOP LAMP CTRL LF TURN SIG LAMP CTRL LIFT GLASS/REAR COMPT LID INTERIOR RELEASE SIG LIFTGATE AJAR SWITCH SIG 1 LINEAR INTERCONNECT NETWORK BUS 2 LINEAR INTERCONNECT NETWORK BUS 3 LOGISTIC MODE RLY CLOSE CTRL LR STOP/TURN SIG LAMP CTRL MTR RELEASE CTRL CRUISE/ETC/TCC BRAKE SIGNAL PASS DR LOCK SW LOCK CTRL PASS DR LOCK SW UNLOCK CTRL POWER DISTRIBUTION SYSTEM PUSH BUTTON START CHALLENGE ACTIVE REAR COMPT LID LAMP CTRL REAR LICENSE LAMP CTRL RED/GRY WIRE RED/WHT WIRE REMOTE PRNDL ENABLE RIGHT CORNERING LAMP RLY CTRL RIGHT FRT DRL CTRL RIGHT FRT TURN SIG LAMP CTRL RIGHT PARK LAMP CTRL RIGHT REAR DR LOCK MTR STATUS RIGHT REAR STOP LAMP CTRL RIGHT REAR STOP/TURN LAMP CTRL RR CLOSURE HANDLE SW OPEN SIG LINEAR INTERCONNECT NETWORK DATA BUS 1 RUN/CRANK RELAY COIL CTRL SERIAL DATA COMM ENABLE STARTING/CHARGING SYSTEM STOP LAMP RELAY COIL CTRL TRANSMISSIONS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM DOOR LOCKS, ANTI-THEFT SYSTEMS VIO WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/YEL WIRE WINDSHIELD WASHER RELAY CTRL WINDSHIELD WIPER MTR RLY COIL WIPER/WASHER SYSTEM YEL WIRE YEL/BLU WIRE YEL/DK BLU WIRE

AUTO OFF BATT POS VOLT BLK WIRE BLK/BRN WIRE BLU/BRN WIRE BLU/WHT WIRE BODY CONTROL MODULE BRK APPLY SENS CTRL BRK APPLY SENS SIG BRL APPLY SENS LO REF BRN/DK GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DRV OUTSIDE REAR VIEW MIRROR PUDDLE LP CTRL FUSE 18 FUSE 21 FUSE 22 FUSE 8 GRN/VIO WIRE GRN/YEL WIRE GROUND GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/YEL WIRE HAZ LED DIMMING SIG HI SPD GMLAN SER DATA (-) 1 HAZ SW LEFT TURN SIG HAZ SW RIGHT TURN SIG HAZ SW SIG HEAD PARK HEADLAMP SW PARK LP SIG HEADLAMP SWITCH HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT CORNERING LAMP LEFT FRONT SIDE MARKER LAMP LEFT FRONT TURN SIGNAL LAMP LEFT HEADLAMP ASSEMBLY LEFT PARK DAYTIME RUNNING LAMP LF TURN SIG LP CTRL LH CORNERING LP RLY CTRL LH PARK LP CTRL LR STOP LP CTRL LR STOP/TURN LP CTRL LT GRN WIRE NCA WIRE REAR LICENSE LP CTRL RED/BRN WIRE RED/DK BLU WIRE RED/DK GRN WIRE RED/GRY WIRE RED/WHT WIRE RF TURN SIG LP CTRL RH CORNERING LP RLY CTRL RH PARK LP CTRL RR STOP LP CTRL RR STOP/TURN LP CTRL STOP LP RLY COIL CTRL TURN SIGNAL/ MULTI-FUNCTION SWITCH VIO WIRE VIO/GRY WIRE VIO/WHT WIRE W/ HID W/O HID WHT WIRE WHT/YEL WIRE YEL/DK BLU WIRE YEL/GRY WIRE

5 VOLT REF BLK WIRE BLK/BRN WIRE BLK/YEL WIRE BLU/WHT WIRE BRAKE PEDAL POSITION SENSOR BRK POS SENS BRK POS SENS SIG BRN/DK GRN WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE ENGINE CONTROL MODULE FUSE 20 GRN/VIO WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY/BRN WIRE GRY/GRN WIRE HI SPEED GMLAN HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LO REF NCA WIRE RED/BRN WIRE RIGHT AUXILIARY TAIL LAMP RIGHT CORNERING LAMP RIGHT FRONT SIDE MARKER LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT HEADLAMP ASSEMBLY RIGHT PARK DAYTIME RUNNING LAMP RIGHT REAR COMPARTMENT LID TAIL LAMP ASSEMBLY SERIAL DATA (-) (1) VIO/GRN WIRE VIO/WHT WIRE W/ HID W/O HID WHT WIRE WHT/GRN WIRE WHT/LT GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL/WHT WIRE

AIR TEMP SENS SIG AJAR SW SIG 1 AMBIENT AIR TEMPERATURE SENSOR BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRN WIRE BRN/LT GRN WIRE COMPUTER DATA LINES SYSTEM DATA BUS 3 DATA BUS 4 DK BLU WIRE DK BLU/BLK WIRE DK GRN/DK BLU WIRE DK GRN/GRY WIRE DK GRN/VIO WIRE DK GRN/YEL WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT REAR OF ENGINE COMPT) ENGINE CONTROL MODULE ENGINE CONTROLS SYSTEM ENGINE OIL LEVEL SWITCH ENGINE OIL PRESSURE SENSOR FUEL LEVEL SENSOR FUEL LEVEL SENSOR ASSEMBLY FUEL PUMP, LEVEL SENSOR ASSEMBLY GRY WIRE GRY/RED WIRE HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA BUS (+) 3 HIGH SPD GMLAN SERIAL DATA (+) 1 LIN DATA BUS 26 LOGIC NCA WIRE OIL LEVEL SW SIG OIL PRESS SENS LOW REF OIL PRESS SENS SIG PARK BRAKE CONTROL SWITCH PARK BRK APPLY SW SIG PARK BRK REL SW SIG PARK BRK REL SW VOLT REF PARK BRK SW SIG PARK BRK SW VOLT REF PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW MOTOR PRIMARY FUEL LEVEL SENSOR PRIMARY LEVEL SENS SIG PRK BRK SW SPLY VOLT REAR COMPARTMENT LID LATCH RED/DK BLU WIRE REMOTE PRNDM ENABLE RF DR AJAR SW SIG RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RLY COIL CTRL RR DR AJAR SW SIG SECONDARY FUEL LEVEL SENSOR SECONDARY LEVEL SENS SIG SIG GND TRANSMISSION SHIFT LEVER TRANSMISSION SHIFT LEVER POSITION INDICATOR TRANSMISSION SHIFT LEVER KNOB VIO/GRY WIRE WHT WIRE WHT/RED WIRE YEL WIRE YEL/BRN WIRE YEL/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

BATTERY POSITIVE VOLT BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLU WIRE BUS 2 COMPUTER DATA LINES SYSTEM CUSHION IND DRIVER SEAT CUSHION SWITCH DRIVER SEAT HEAT SWITCH DRIVER VENTILATED SEAT SWITCH DRV HEATED BACK NTC SIG FUSE 21 FUSE 22 GRN/BLU WIRE GRN/VIO WIRE GRY WIRE GRY/GRN WIRE HEAT IND HOT AT ALL TIMES IND INTERCONNECT LEFT REAR BACK SEAT HEATING ELEMENT LEFT REAR CUSHION SEAT HEATING ELEMENT LINEAR LOCAL INTERCONNECT NETWORK BUS 2 LOGIC LR CUSHION CLIMATE NTC RETURN LR HEATED SEAT CUSHION ELEMENT RETURN LR SEAT CLIMATE NTC RETURN LR SEAT CLIMATE NTC SIG MEDIUM NCA WIRE NETWORK ORG/BRN WIRE ORG/VIO WIRE PASS HEATED BACK NTC SIG PASS HEATED SEAT NTC SIG PASSENGER PASSENGER SEAT CUSHION SWITCH PASSENGER SEAT HEAT SWITCH PASSENGER VENTILATED SEAT SWITCH PPL PPL LR HEATED SEAT CUSHION ELEMENT SPLY VOLT REAR BODY FUSE BLOCK REAR SEAT HEATING CONTROL MODULE RED/WHT WIRE RED/YEL WIRE RIGHT REAR BACK SEAT HEATING ELEMENT RIGHT REAR CUSHION SEAT HEATING ELEMENT RR CUSHION CLIMATE NTC RETURN RR HEATED SEAT CUSHION ELEMENT RETURN RR HEATED SEAT CUSHION ELEMENT SPLY CTRL RR SEAT CLIMATE NTC RETURN SEAT HEAT SEAT HEAT IND SEAT IND SEAT) VENTILATION VIO/WHT WIRE WHT WIRE YEL 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

ACC WAKEUP BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/VIO WIRE BLU/WHT WIRE BRN/DK BLU WIRE BRN/WHT WIRE COMPUTER DATA LINES DATA OUT SIG DK BLU WIRE DK BLU/BLK WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE FUEL LEVEL SENSOR FUEL MDL FUSE FUEL PUMP FUEL PUMP CTRL FUEL PUMP DRIVER CONTROL MODULE FUEL PUMP, LEVEL SENSOR ASSEMBLY (IN FUEL TANK) GRY WIRE GRY/WHT WIRE HI SPD GMLAN HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT KNOCK SENSOR #2 KNOCK SENSOR 1 LOW REF LT GRN/DK BLU WIRE MIL SS FUSE NCA WIRE PRIMARY FUEL LEVEL SENSOR RED/VIO WIRE SECONDARY FUEL LEVEL SENSOR FUEL LEVEL SENSOR ASSEMBLY SERIAL DATA SERIAL DATA (+) (3) SHIELD GND SYSTEM UNDERHOOD FUSE BLOCK VIO/DK BLU WIRE VIO/GRY WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU 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

BANK 1 EXHAUST CAMSHAFT POSITION SENSOR BANK 1 INTAKE CAMSHAFT POSITION ACTUATOR SOLENOID VALVE BANK 2 EXHAUST CAMSHAFT POSITION SENSOR BANK 2 INTAKE CAMSHAFT POSITION ACTUATOR SOLENOID VALVE BANK 2 INTAKE CAMSHAFT POSITION SENSOR BANK 2 VALVE LIFTER OIL SOLENOID VALVE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLU/WHT WIRE BRN WIRE BRN/DK BLU WIRE BRN/RED WIRE BRN/WHT WIRE CAM PHASER W LOW REF CAM PHASER Y LOW REF CHARGE IND CTRL CMP LOW REF 2 COMMAND SIG CRK LOW REF DK BLU WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE ENGINE CONTROL MODULE EXHAUST SENS (1) EXHAUST SENS 2 EXHAUST SENS CTRL 2 FUEL RAIL PRESSURE LOW REF FUEL RAIL PRESSURE SENSOR (ON FUEL RAIL) GRY/LT GRN WIRE GRY/YEL WIRE HIGH CTRL HIGH PRESSURE FUEL PUMP IGN CTRL (1) IGN CTRL (2) IGN CTRL (3) IGN CTRL (4) IGN CTRL (5) IGN CTRL (6) INTAKE SENS 2 INTAKE SENS CTRL 2 INTAKE SOL (1) INTAKE SOL 2 LOCK CTRL LOGIC LOW CTRL LOW REF 2 LOW REF BANK 1 LOW REF BANK 2 LT GRN WIRE LT GRN/BRN WIRE LT GRN/DK BLU WIRE LT GRN/LT BLU WIRE NAVIGATION, SOUND SYSTEMS REPLICATED SIG SENS CTRL 1 SENS LOW REF 1 SOL CTRL SOL CTRL 1 SOL CTRL 2 STARTING/ CHARGING SYSTEM TEMP SENS SIG TP SENS LOW REF TP SENS SIG VIO/BLK WIRE VIO/BRN WIRE VIO/DK BLU WIRE WHT/LT BLU WIRE YEL WIRE YEL/DK BLU WIRE YEL/LT GRN WIRE