Buick LaCrosse II (2009-2013) lt grn/vio Wiring diagrams

A/C COMPRESSOR SOLENOID VALVE AIR QUALITY SENSOR (BELOW AIR INLET GRILL PANEL) BLK WIRE BLK/DK BLU WIRE BLOWER MTR SPD CTRL BRN/VIO WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOLING FAN LOW SPEED RELAY DEFOGGER SYSTEM DK BLU WIRE DK BLU/LT GRN WIRE FUSE GRN WIRE GRN/YEL WIRE GRY WIRE GRY/DK BLU WIRE GRY/LT GRN WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED HUMIDITY SENS SIG TWILIGHT SENTINEL DELAY SIG HVAC CONTROL MODULE INSIDE AIR TEMP SENS LOW REF REAR DEFOG RLY CTRL LEFT COOLING FAN HIGH SPEED RELAY LINEAR INTERCONNECT NETWORK BUS 9 LOGIC LT GRN DK BLU/ WIRE LT GRN/VIO WIRE RED/VIO WIRE RED/WHT WIRE RIGHT COOLING FAN HIGH SPEED RELAY SOLAR SENS DRV SIG TEMP SENS LOW REF UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE

A/C SWITCH AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) ANTI-THEFT SYSTEM HEADLIGHTS SYSTEM AUTO A/C SWITCH BLK WIRE BLOWER SPD DN BLOWER SPD UP BRN/YEL WIRE DEFROST SWITCH DK BLU WIRE GRN/YEL WIRE GRY WIRE IND POWER ON LEFT COOLING FAN MOTOR LOGIC LT GRN/VIO WIRE MODE DOWN MODE UP POWER ON SWITCH RADIO/HVAC CONTROLS RECIRCULATOR SWITCH RED/VIO WIRE RIGHT COOLING FAN MOTOR SWITCH DEFOGGER TEMP DOWN TEMP UP WHT WIRE WHT/DK BLU WIRE WINDSHIELD YEL WIRE

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

1969 28 HEADLIGHTS SYSTEM HORNS SYSTEM 2500 2501 COMPUTER DATA LINES SYSTEM 5077 7541 STARTING/CHARGING SYSTEM EXTERIOR LIGHTS SYSTEM 5797 6132 TRUNK, TAILGATE, FUEL DOORS SYSTEM COMPUTER DATA LINES SYSTEM 5911 3271 2150 294 1303 DOOR LOCKS SYSTEM 6133 6134 COMPUTER DATA LINES SYSTEM BATTERY BLK WIRE BLK/VIO WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/GRY WIRE BRN/LT GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CHILD SECURITY LCK MTR SHIFT POSITION SIG CHILD SECURITY LOCK RLY CTRL COLUMN) DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DOOR LOCK CONTROL CHILD SECURITY LCK MTR COURTESY LAMP SW SIG DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM SHIFT INTERLOCK SYSTEM DOOR LOCKS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM FOG LAMP RELAY CONTROL LIFT GLASS/TRUNK RELEASE CTRL CRUISE/ETC/TCC BRAKE SIGNAL GRN/BLU WIRE GRN/BRN WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BRN WIRE GRY/LT GRN WIRE GRY/YEL WIRE HEADLAMP HIGH BEAM RLY CTRL HORN RLY CTRL HEADLIGHTS SYSTEM HI SPEED GMLAN DATA BUS (+) HI SPEED GMLAN DATA BUS (-) HOT AT ALL TIMES IGNITION SWITCH INTERCONNECT NETWORK BUS 2 INTERCONNECT NETWORK BUS 3 INTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM KEY-IN IGNITION SWITCH LED AMBIENT LIGHTING CTRL 1 LOW REFERENCE STOP LAMP SPLY VOLT LT GRN/GRY WIRE LT GRN/RED WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE OFF POWER DISTRIBUTION SYSTEM PPL PPL PPL RED/LT GRN WIRE RED/WHT WIRE RR CLOSURE HANDLE SW OPEN SIG INTERCONNECT NETWORK BUS 1 RUN RELAY COIL CONTROL RUN WIRE STARTING/CHARGING SYSTEM STARTING/CHARGING SYSTEM COMPUTER DATA LINES SYSTEM VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/VIO WIRE WHT/YEL WIRE WINDSHIELD WIPER SW HI SIG WIPER/WASHER SYSTEM YEL 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

12 24 HAZ SW LEFT TURN SIG HAZ SW RIGHT TURN SIG PPL 22 17 4 19 HEADLAMP SW PARK LP SIG HAZ LED DIMMING SIG B+ BRK APPLY SENS LO REF BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE CENTER HIGH MOUNTED STOP LAMP COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DK GRN WIRE FUSE GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BRN WIRE GRY/YEL WIRE HAZARD SWITCH HEAD PARK AUTO HEADLAMP SWITCH HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 LEFT FRONT SIDE MARKER LAMP LEFT LICENSE PLATE LAMP LEFT PARK/ TURN SIGNAL LAMP LEFT REAR TURN SIGNAL LAMP LEFT TAIL LAMP LEFT TAIL/ STOP LAMP LEFT REAR SIDE MARKER LAMP LT BLU WIRE LT GRN WIRE LT GRN/RED WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE OFF PPL RED WIRE RED/ LT BLU WIRE RED/BRN WIRE RED/DK GRN WIRE RED/LT GRN WIRE RED/WHT WIRE RIGHT LICENSE PLATE LAMP VIO/GRY WIRE W/ HID W/O HID WHT WIRE WHT/ DK BLU WIRE WHT/YEL WIRE

BATT POS VOLT BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/LT GRN WIRE COMPUTER DATA LINES SYSTEM DK GRN (OR LT GRN) WIRE FUSE OF BATTERY) GRN/PPL WIRE GRY WIRE HOOD AJAR SW SIG HOOD AJAR SWITCH (FRONT OF ENGINE COMPT) HOT AT ALL TIMES IMMOBILIZER CONTROL MODULE (CENTER CONSOLE) LT GRN WIRE LT GRN/VIO WIRE NETWORK BUS 11 PPL RED/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE VEH IMMOBILIZER RTN VEH SPLY VOLT YEL 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

A/C REFRIGERANT PRESSURE SENSOR (FRONT OF ENGINE COMPT, MOUNTED TO CONDENSER) ACCELERATOR PEDAL POSITION (APP) SENSOR (LEFT SIDE OF DASH) ACCESSORY WAKEUP SERIAL DATA GMLAN SERIAL DATA (+) APP LOW REFERENCE 1 APP SENS 1 SIG BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM 5 6 3 CRUISE CONTROL SYSTEM DK BLU WIRE DK BLU/LT GRN WIRE DK BLU/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) EVAP CANISTER VENT SOL CTRL HEATER LO CTRL BANK 2 SENS 2 FUEL LEVEL SENS LOW REF FUEL PUMP PRIMARY RELAY CTRL LOW REF FUEL LVL SENS SIG FUSE FUSE FUSE GRN WIRE GRY/WHT WIRE HI SPD COOLING FAN RELAY CTRL LO SPD COOLING FAN RLY CTRL APP LOW REF 2 HIGH SIGNAL BANK 1 SENSOR 2 A/C REFRIGERANT PRE SENS SIG HOT W/ IGNITION MAIN RELAY ENERGIZED IAT SENS SIG HI SIG BANK 2 SENSOR 2 CRUISE/ETC/TCC BRAKE SIGNAL INSTRUMENT CLUSTER SYSTEM LT BLU/BLK(OR DK BLU/WHT) WIRE LT GRN WIRE LT GRN/GRY WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE MAF SENS SIG PARK/NEUTRAL SIGNAL RED/BRN WIRE STARTING/ CHARGING SYSTEM TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRY WIRE WHT/RED DK BLU WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE YEL/WHT WIRE