Buick LaCrosse II (2009-2013) blk/brn Wiring diagrams

BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLOWER MTR SPD CTRL BLOWER MTR SPLY VOLT BLU WIRE BRN/YEL WIRE DK BLU WIRE DUCT LEFT LOWER AIR TEMPERATURE SENSOR (LEFT SIDE OF HVAC CONTROL MODULE) DUCT LEFT UPPER AIR TEMPERATURE SENSOR (LEFT SIDE OF HVAC MODULE) DUCT RIGHT LOWER AIR TEMPERATURE SENSOR (BEHIND HVAC CONTROL MODULE) DUCT RIGHT UPPER AIR TEMPERATURE SENSOR (RIGHT SIDE OF HVAC MODULE) FT BLOWER MTR LOW REF FUSE GRY/DK GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT LT GRN/VIO WIRE PPL/GRY WIRE RED WIRE RED/BRN WIRE RED/VIO WIRE SIDE OF DASH) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT/PPL WIRE

3.6L A/C LOW REF A/C SENS SIG AIR INLET ACTUATOR (RIGHT SIDE OF HVAC MODULE) AIR RECIRCULATION DOOR ACTUATOR BATT+ VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/PNK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE ENG TEMP SENS SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) EXCEPT 3.6L GMLAN SERIAL DATA GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BRN WIRE GRY/DK GRN WIRE GRY/RED WIRE GRY/WHT WIRE HI SPD FAN RLY CTRL HVAC CONTROL MODULE LEFT AIR TEMPERATURE DOOR ACTUATOR (LEFT SIDE OF HVAC ASSEMBLY) LO SPD FAN RLY CTRL LOGIC LOWER LEFT AIR TEMP SENS SIG LOWER RIGHT AIR TEMP SENS SIG LT GRN WIRE LT GRN/VIO WIRE MODE DOOR ACTUATOR ORG/ WIRE ORG/BLU WIRE PPL/GRY WIRE RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE RIGHT AIR TEMPERATURE DOOR ACTUATOR (RIGHT SIDE OF HVAC MODULE) SENS LO REF SENS LOW REF SIG GND TEMP DR STEPPER MTR CTRL 1 VIO/BLU WIRE WHT WIRE WHT/PNK WIRE WHT/PPL WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

11 12 IG MODE SW CTRL LOW REF 21 20 W/ KEYLESS ENGINE START 3 4 PPL PPL ACC VOLT RUN/CRANK 1 VOLT 307 3287 HEADLIGHTS SYSTEM HORNS SYSTEM 664 94 EXTERIOR LIGHTS SYSTEM WIPER/WASHER SYSTEM ACC IND ACCESSORY LED SIGNAL LIGHTING CONTROL SW SIG AMBIENT LIGHT SENSOR SIGNAL SW SIG PPL ANTI-THEFT SYSTEM HEADLIGHTS SYSTEM BLK WIRE BLK/BRN WIRE BRAKE APPLY SENSOR SIGNAL LED BACKLIGHT DIMMING CTRL BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE CONTROL SYSTEM INTERIOR LIGHTS SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM EXTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM DRIVER DR LK SW LOCK SIG FUSE FUSE (LOWER LEFT SIDE OF DASH) FUSE FUSE FUSE FUSE FUSE GRN WIRE GRN/GRY WIRE GRN/PPL WIRE GRY WIRE GRY/LT GRN WIRE GRY/WHT WIRE HDLP SW FLASH TO PASS SIG HORN SWITCH SIGNAL HEADLAMP OFF SIG HEADLAMP SW ON SIG HAZARD LED DIMMING SIGNAL HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM TRANSMISSIONS SYSTEM HOT AT ALL TIMES IGNITION KEY RESISTOR SIG IGNITION MODE SWITCH INSTRUMENT PANEL FUSE BLOCK INTERIOR LAMP DEFEAT SW SIG KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LT GRN WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE NAVIGATION SYSTEM OFF/RUN/CRANK VOLT PPL HAZARD SW TURN RIGHT SIG WINDSHIELD WASHER SW SIG PPL PPL PPL PPL 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 PPL PPL W/O KEYLESS ENGINE START RED WIRE RED/BLK WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE SHIFT INTERLOCK SYSTEM SOUND SYSTEMS START IND UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/YEL WIRE WHT WIRE WINDSHIELD WIPER SW HI SIG WIPER/WASHER SYSTEM YEL WIRE YEL/LT GRN WIRE

A/C COMPRESSOR SOLENOID VALVE A/C LOW REF A/C REFRIGERANT PRESSURE SENSOR (FRONT OF ENGINE COMPT, MOUNTED TO CONDENSER) A/C SENS SIG BATT+ VOLT BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/LT GRN WIRE ELECTRIC CTRL ELECTRIC SPLY ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) EXCEPT 3.6L 3.6L FUSE GRN WIRE HOT AT ALL TIMES HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE IGN 1 VOLT LT GRN WIRE RED/BRN WIRE RED/WHT WIRE SERIAL DATA SIG GND UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/GRY WIRE WHT WIRE

2.4L, 3.6L 3.0L 3.0L, 3.6L 2.4L 57 51 14 15 30 34 33 53 52 54 49 15 34 25 48 47 BRK SIG IGN 1 VOLTAGE 7 13 BRAKE APPLY SENS SIG SUPPLY VOLTAGE 9 4 CRUISE CONTROL SW SIG LIGHTING CTRL SW REF ACCELERATOR PEDAL POSITION SENSOR (LEFT SIDE OF DASH) AUTOMATIC TRANSMISSION ASSEMBLY BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/VIO WIRE BLK/WHT WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR PEDAL ASSEMBLY) BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY CRUISE IND CRUISE SWITCH CRUISE/ETC/TCC BRK SIG DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) FUSE GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT FUSE SIDE OF DASH) HOT W/ IGN MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LEFT STEERING WHEEL CONTROL SWITCH LOGIC LOW RE LOW REF 2 LT GRN/WHT WIRE POSITIVE VOLTAGE RED/BLK WIRE RED/WHT WIRE RES+ SENS SIG 1 LOW REF SENS SIG (2) ACTUATOR CTRL CLOSE ACTUATOR CTRL OPEN SET- SIG 1 LOW REF 1 SIG 2 SOUND SYSTEMS STEERING WHEEL AIR BAG COIL TRANSMISSION CONTROL MODULE TRANSMISSION INPUT SHAFT SPEED SENSOR TRANSMISSION OUTPUT SHAFT SPEED SENSOR UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/LT GRN WIRE WHT WIRE WHT/DK BLU WIRE WHT/RED WIRE YEL (OR WHT) WIRE YEL WIRE YEL/BLK (OR DK BLU) WIRE YEL/BLK WIRE YEL/WHT WIRE

135 MM FROM BREAKOUT TO 6105 6106 6106 6106 COMPUTER DATA LINES SYSTEM BLK WIRE BLK/BRN WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/GRY WIRE DK GRN/GRY WIRE DRIVER INFORMATION CENTER DISPLAY ESC OFF IND FUSE 31 GMLAN SER DATA (+) GMLAN SER DATA (+) GMLAN SER DATA (-) GMLAN SER DATA (-) GRN WIRE GRY/DK BLU WIRE GRY/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT SHOCK ABSORBER ACTUATOR LEFT FRONT VERTICAL BODY ACCELERATION SENSOR (LEFT FRONT STRUT TOWER) LEFT REAR SHOCK ABSORBER ACTUATOR LF WHL ACC LOW REF LOGIC LT GRN/GRY WIRE LT GRN/VIO WIRE NCA WIRE ORG/ WIRE PACK) PNK/BLK WIRE PPL REAR BODY FUSE BLOCK (ON LEFT REAR WHEELHOUSE) REAR VERTICAL BODY ACCELERATION SENSOR (FRONT OF REAR COMPT) RED/GRY WIRE RIGHT FRONT SHOCK ABSORBER ACTUATOR RIGHT FRONT VERTICAL BODY ACCELERATION SENSOR (RIGHT FRONT STRUT TOWER) RIGHT REAR SHOCK ABSORBER ACTUATOR SUSPENSION CONTROL MODULE (LEFT CORNER OF REAR COMPT) TCS/ ESC IND WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/RED BLK/BRN WIRE YEL/RED WIRE

1 2 3 4 5 6 POS VOLT GND VOLT AJAR SW SIG BATT FUSE BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU/BLK WIRE DK BLU/WHT WIRE GRN WIRE GRN/GRY WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES IGNITION MODE SWITCH KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LOW REF (7) SIG (6) LOW REF (6) SIG (8) LOW REF (8 SIG (7) LT GRN WIRE LT GRN/BLK WIRE MTR FUSE WHEELHOUSE) NETWORK BUS 4 PASSENGER DOOR LATCH ASSEMBLY POS VOLT GND PPL PPL REAR BODY FUSE BLOCK (ON LEFT REAR RED/DK BLU WIRE RED/WHT WIRE RIGHT REAR DOOR LATCH ASSEMBLY RR LATCH CTRL LR LATCH CTRL PASS DR LATCH CTRL DRV DR LATCH CTRL RR UNLATCH CTRL LR UNLATCH CTRL PASS DR UNLATCH CTRL DRV DR UNLATCH CTRL SERIAL DATA SW MODE CTRL LOW REF VIO/BLK WIRE VIO/DK BLU WIRE VIO/YEL WIRE WHT/LT GRN WIRE WHT/YEL WIRE YEL/BLK WIRE

4 6 NETWORK BUS 3 AJAR SW SIG AJAR SW SIG ANT LO REF (2) ANT LO REF (5) ANT SIG (2) BLK WIRE BLK/BRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM LOGIC DK BLU WIRE DK BLU/VIO WIRE DOOR HANDLE TOUCH SENSOR DR LK CTRL SW LK SIG ANT SIG (5) DRIVER DOOR HANDLE KEYLESS ENTRY ANTENNA DRIVER DOOR LATCH ASSEMBLY DRIVER EXTERIOR DOOR HANDLE ASSEMBLY DRIVER EXTERIOR DOOR HANDLE SWITCH DRIVER EXTERIOR DOOR HANDLE TOUCH SENSOR DRIVER INFORMATION CENTER DISPLAY SECURITY IND DRIVER WINDOW MOTOR (DRIVER'S DOOR) DRIVER WINDOW SWITCH GMLAN SERIAL DATA GRN WIRE GRN/YEL WIRE GRY WIRE GRY/DK BLU WIRE GRY/YEL WIRE INSTRUMENT CLUSTER KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LEFT REAR EXTERIOR DOOR HANDLE SWITCH LT GRN WIRE LT GRN/WHT WIRE NETWORK BUS 3 ORG/ WIRE PACK) PASS DR SW LK CTRL ANT SIG (1) ANT LO REF (1) PASSENGER DOOR HANDLE KEYLESS ENTRY ANTENNA PASSENGER EXTERIOR PASSENGER EXTERIOR DOOR HANDLE ASSEMBLY PASSENGER EXTERIOR DOOR HANDLE SWITCH PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) PPL PPL PASS DR UNLATCH SW SIG DRV DR UNLATCH SW SIG REAR FASCIA KEYLESS ENTRY ANTENNA (BEHIND REAR BUMPER) RED WIRE RIGHT REAR EXTERIOR DOOR HANDLE SWITCH STATUS CTRL UNLOCK SIGNAL VIO/DK BLU WIRE VIO/GRY WIRE WHT WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/DK BLU WIRE YEL/VIO WIRE

A/C SENS SIG ACCELERATOR PEDAL POSITION SENSOR (LEFT SIDE OF DASH) APP SENS SIG 1 APP SIG BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLU/VIO WIRE BLU/WHT WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CHECK ENG IND CTRL COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM CRUISE CONTROL SYSTEM DK BLU WIRE DK BLU/BLK WIRE DK BLU/LT GRN WIRE DK BLU/WHT WIRE ENG RLY CTRL IGN 1 VOLT ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) EVAPORATIVE EMISSION VENT SOLENOID VALVE (UNDER LEFT REAR OF VEHICLE) FAN RLY CTRL FUEL LVL SEN SIG FUEL LVL SENS LO REF FUEL PRES SENS SIG FUEL PUMP RLY CTRL FUEL PUMP, LEVEL SENSOR ASSEMBLY (IN FUEL TANK) FUEL TANK PRESSURE SENSOR GRN WIRE GRY WIRE HI SER DATA BUS (+) HI SER DATA BUS (-) IGN 1 VOLT B+ PDL POS LOW REF LOW REF LT GRN WIRE LT GRN/DK BLU WIRE LT GRN/GRY WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE PDL POS LOW REF RED/BRN WIRE RED/LT GRN WIRE SOLENOID CTRL SOLENOID CTRL SOLENOID CTRL CRUISE/ETC/TCC BRAKE SIG STARTER RLY CTRL STARTING/CHARGING SYSTEM VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/YEL WIRE WAKE-UP SER DATA WHT WIRE WHT/DK BLU WIRE WHT/RED WIRE YEL WIRE YEL/RED WIRE YEL/WHT WIRE

BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE CAMSHAFT POSITION SENSOR CNRK POS SENS SIG DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE ECT SENS SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE SENSOR (RIGHT REAR OF ENGINE) ENGINE OIL PRESSURE SWITCH (FRONT OF ENGINE) EXHAUST BANK 1 SIG EXHAUST CAMSHAFT POSITION SENSOR (RIGHT REAR OF ENGINE BELOW CAMSHAFT COVER) GRY/DK BLU WIRE GRY/YEL WIRE HIGH CTRL HIGH PRESSURE FUEL PUMP IC 1 CTRL IC 2 CTRL IC 3 CTRL IC 4 CTRL INTAKE BANK 1 SIG INTAKE CAMSHAFT POSITION SENSOR (LEFT FRONT CORNER OF CYLINDER HEAD) LOW CTRL LOW REF LT GRN WIRE LT GRN/DK BLU WIRE NCA WIRE OIL PRESSURE SW SIG RED/WHT WIRE SPARK PLUG VIO/BLK WIRE VIO/DK BLU WIRE YEL WIRE YEL/DK BLU WIRE YEL/VIO WIRE