Buick LaCrosse III (2016-2019) underhood fuse block Wiring diagrams

ACC WAKEUP SER DATA AUTOMATIC TRANSMISSION ASSEMBLY BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE GEAR SHIFT POSITION SENSOR GRN WIRE GRY WIRE HIGH SPD SER DATA (+) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT LINE PRESSURE CONTROL SOLENOID VALVE LOGIC LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE PARK/NEUTRAL SIGNAL 1 PPL/BLK WIRE PRESSURE CONTROL SOLENOID VALVE 1 PRESSURE CONTROL SOLENOID VALVE 2 PRESSURE CONTROL SOLENOID VALVE 3 PRESSURE CONTROL SOLENOID VALVE 4 PRESSURE CONTROL SOLENOID VALVE 5 PRESSURE CONTROL SOLENOID VALVE 7 RED WIRE RED/GRN WIRE SERIAL DATA (-) (1) SHIFT SOLENOID VALVE 1 SHIFT SOLENOID VALVE 2 SIG GND SUPPLY VOLT 2 TCM/ IGN FUSE TCM/ECM FUSE TORQUE CONVERTER CLUTCH PRESSURE CONTROL SOLENOID VALVE TRANSMISSION CONTROL MODULE TRANSMISSION FLUID TEMPERATURE SENSOR TRANSMISSION INPUT SHAFT SPEED SENSOR TRANSMISSION OUTPUT SHAFT SPEED SENSOR UNDERHOOD FUSE BLOCK VIO WIRE VIO/YEL WIRE WHT WIRE WHT/GRY WIRE YEL 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

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 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

BLK WIRE BRN WIRE FUSE GROUND GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE HEATED STEERING WHEEL IND HEATED STEERING WHEEL SWITCH HOT W/ IGNITION MAIN RELAY ENERGIZED HTD WHL FUSE IGN INSIDE STEERING WHEEL) LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LT BLU WIRE ORG/ WIRE PNK SW LED CTRL WIRE PPL/BLU WIRE RED WIRE RED/BLK WIRE RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE SW SIG UNDERHOOD FUSE BLOCK VIO/GRY WIRE VOLT REF WHT WIRE YEL 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

BATTERY POSITIVE VOLTAGE BLK WIRE BLU/VIO WIRE BLU/YEL WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DRIVER PWR SEAT FUSE DRIVER SEAT FRONT VERTICAL MOTOR DRIVER SEAT HORIZONTAL MOTOR DRIVER SEAT REAR VERTICAL MOTOR DRIVER SEAT RECLINE MOTOR FRONT VERTICAL MTR DWN CTRL FRONT VERTICAL MTR UP CTRL GRN WIRE GRN/BRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE HORIZONTAL MTR FORWARD CTRL HORIZONTAL MTR REARWARD CTRL HOT AT ALL TIMES LINEAR INTERCONNECT NETWORK BUS 8 LOW SPEED GMLAN SERIAL DATA LT GRN WIRE REAR VERTICAL MTR DOWN CTRL REAR VERTICAL MTR UP CTRL RECLINE MTR FORWARD CTRL RECLINE MTR REARWARD CTRL RED/BLU WIRE RED/DK BLU WIRE RED/VIO WIRE SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) UNDERHOOD FUSE BLOCK WHT/BLK WIRE WHT/RED WIRE WNDW MIR SEAT FUSE YEL WIRE YEL/BLU WIRE

2 WAY 8 WAY AIR QUALITY SENSOR BLU WIRE CHASSIS CONTROL MODULE COLLISION ALERT INDICATORS DK BLU WIRE DRIVER BACK SEAT BLOWER MOTOR DRIVER CUSHION SEAT BLOWER MOTOR DRIVER SEAT LUMBAR SUPPORT PUMP DRIVER SEAT LUMBAR SUPPORT SWITCH DRIVER WINDOW/ OUTSIDE REAR VIEW MIRROR SWITCH ELECTRONIC BRAKE CONTROL MODULE FROM EBOOST/ COOL FAN LT FUSE (DIAGRAM 2 OF 8) FROM IGNITION MAIN RELAY (DIAGRAM 8 OF 8) FUEL PUMP DRIVER CONTROL MODULE HEADLAMP SWITCH HVAC CONTROL MODULE INSIDE REAR VIEW MIRROR INSTRUMENT CLUSTER IP BODY IGN FUSE MIL SS FUSE NCA WIRE PASSENGER BACK SEAT BLOWER MOTOR PASSENGER CUSHION SEAT BLOWER MOTOR PASSENGER SEAT LUMBAR SUPPORT PUMP PASSENGER SEAT LUMBAR SUPPORT SWITCH PASSENGER WINDOW SWITCH PNK WIRE REAR VIEW CAMERA REAR WINDOW SUNSHADE MODULE RED WIRE RED/BLU WIRE RED/DK BLU WIRE RVC/VENT FUSE SEAT MEMORY CONTROL MODULE TRANSMISSION RANGE CONTROL MODULE UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLK WIRE VIO/GRY WIRE VIO/WHT WIRE W/ DRIVER MASSAGE SEAT CONTROL, FRONT SEAT HEATER W/ EXPRESS UP/DOWN W/ FRONT SEAT HEATER W/ LIGHT SENSITIVE MIRROR W/ MASSAGE SEAT CONTROL W/ PASSENGER MASSAGE SEAT CONTROL, FRONT SEAT HEATER WNDW MIR SEAT FUSE

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

BLK WIRE BLK/ORG WIRE BRN/ORG WIRE BRN/WHT WIRE DK BLU WIRE DK GRN/ORG WIRE DRIVER SEAT BELT ANCHOR PRETENSIONER DRIVER SEAT BELT RETRACTOR PRETENSIONER DRIVER SEAT BELT SWITCH DRIVER SEAT BELT BUCKLE DRIVER SEAT SIDE AIR BAG DRV ANCHOR PRETEN LO CTRL DRV SEAT BELT LO REF DRV SEAT BELT SWITCH SIG DRV SEAT HI CTRL DRV SEAT LO CTRL DRV SIDE IMPACT MOD HI CTRL DRV SIDE IMPACT MOD LO CTRL GRN/ORG WIRE GRY/ORG WIRE HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE LEFT REAR SEAT SIDE AIR BAG LF DISCRIMINATING SENS SIG LF HEAD MOD HI CTRL LF HEAD MOD LO CTRL LF SIDE IMPACT MOD LO REF LF SIDE IMPACT MOD SIG LF SNSR LO REF LH MID SIDE IMPACT MOD LO REF LH MID SIDE IMPACT MOD SIG LR SIDE IMPACT SPLY VOLT NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/BLU WIRE ORG/BRN WIRE ORG/GRN WIRE ORG/GRY WIRE ORG/VIO WIRE ORG/WHT WIRE ORG/YEL WIRE PASS ANCHOR PRETEN HI CTRL PASS ANCHOR PRETEN LOW CTRL PASS SEAT BELT LO REF PASS SEAT BELT REMINDER SIG PASS SEAT BELT SWITCH SIG PASS SEAT HI CTRL PASS SEAT LO CTRL PASS SIDE IMPACT MOD HI CTRL PASS SIDE IMPACT MOD LO CTRL PASSENGER PRESENCE SENSOR PASSENGER SEAT BELT BUCKLE PASSENGER SEAT BELT SWITCH RED/DK BLU WIRE RF DISCRIMINATING SENS SIG RF HEAD HI CTRL RF HEAD LO CTRL RF SIDE IMPACT MOD LO REF RF SIDE IMPACT MOD SIG RF SNSR LO REF RH MID SIDE IMPACT MOD LO REF RH MID SIDE IMPACT MOD SIG RIGHT REAR SEAT SIDE AIR BAG RIGHT ROOF RAIL AIR BAG (RIGHT EDGE OF ROOF, ABOVE DOOR OPENINGS) SADS FUSE SHORTING BAR UNDERHOOD FUSE BLOCK VIO/ORG WIRE WHT/ORG WIRE YEL/ORG WIRE