Buick LaCrosse II (2009-2013) radio/hvac controls Wiring diagrams

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

4 2 7531 5060 NETWORK BUS 9 LO SPD GMLAN SERIAL DATA ACTUATOR TRANSMIT SIG BREAKOUT TO INLINE TO DRIVER SEAT HARNESS) GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE GRY/RED WIRE HEAD-UP DISPLAY (IF EQUIPPED) HVAC CONTROL MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (BELOW CENTER CONSOLE) INFO DISPLAY MODULE INSTRUMENT CLUSTER KEYLESS ENTRY CONTROL MODULE LEFT SIDE OBJECT SENSOR (IF EQUIPPED) (BEHIND LEFT REAR WHEEL) LO SPD GMLAN SERIAL DATA LT GRN/WHT WIRE MULTIMEDIA PLAYER INTERFACE MODULE (W/ AUDIO INTERFACE) NCA WIRE NETWORK BUS 8 OUTSIDE REAR VIEW MIRROR SWITCH PASSENGER PRESENCE DETECTION MODULE (UNDER FRONT PASSENGER'S SEAT) PASSENGER WINDOW SWITCH PPL RADIO RADIO/HVAC CONTROLS REAR PARKING ASSIST CONTROL MODULE (W/ REAR PARKING ASSIST SENSOR INDICATOR) RIGHT SIDE OBJECT SENSOR (BEHIND RIGHT REAR WHEEL) SEAT HEATING CONTROL MODULE (UNDER FRONT CENTER OF DRIVER SEAT) SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) SPLICE PACK TELEMATICS COMMUNICATIONS INTERFACE CONTROL MODULE VIO WIRE W/ MEMORY W/ NAVIGATION W/O MEMORY W/O NAVIGATION YEL WIRE

10 1 DRV SEAT MTR CTRL PASS SEAT MTR CTRL BLK WIRE BLK/GRY WIRE BLK/RED WIRE BLU/BRN WIRE BRN/DK BLU WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DK BLU/BLK WIRE DRIVER BACK SEAT HEATING ELEMENT (DRIVER'S SEAT BACK) DRIVER COOLED SEAT SWITCH DRIVER CUSHION SEAT BLOWER MOTOR (UNDER CENTER OF DRIVER CUSHION) DRIVER CUSHION SEAT HEATING ELEMENT (DRIVER'S SEAT CUSHION) DRIVER HEATED SEAT SWITCH FUSE GMLAN SERIAL DATA GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/PPL WIRE GRY/BLK WIRE GRY/GRN WIRE HIGH HEAT HIGH HEAT IND HOT AT ALL TIMES HOT IN RUN OR START IGN IGNITION MAIN RELAY IND LO REF LOCAL NETWORK 10 LOGIC LOW HEAT IND MED HEAT MED HEAT IND PASS HTD SEAT ELEMENT VOLT PASS HTD SEAT NTC SIG PASSENGER BACK SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT BACK) PASSENGER COOLED SEAT SWITCH PASSENGER CUSHION SEAT BLOWER MOTOR (UNDER FRONT PASSENGER SEAT CUSHION) PASSENGER CUSHION SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT CUSHION) PASSENGER HEATED SEAT SWITCH PNK DRV HTD SEAT NTC SIG DRV HTD SEAT ELEMENT VOLT WIRE PNK WIRE RADIO/HVAC CONTROLS REAR BODY FUSE BLOCK (ON LEFT REAR WHEELHOUSE) RED/BLK WIRE RED/GRN WIRE RED/LT GRN WIRE RED/WHT WIRE SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/WHT WIRE WHT WIRE WHT/GRY WIRE WHT/ORG WIRE WHT/PPL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LO REF LO REF BLK WIRE BLK/GRY WIRE BLK/RED WIRE BLU/BRN WIRE BRN/BLK WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DK BLU/BLK WIRE DRIVER BACK SEAT HEATING ELEMENT (DRIVER'S SEAT BACK) DRIVER COOLED SEAT SWITCH DRIVER CUSHION SEAT HEATING ELEMENT (DRIVER'S SEAT CUSHION) DRIVER HEATED SEAT SWITCH DRV HTD VOLT FUSE GMLAN SERIAL DATA GRN/BLK WIRE GRN/BLU WIRE GRN/PPL WIRE GRY/BLK WIRE GRY/GRN WIRE HIGH HEAT HIGH HEAT IND HOT AT ALL TIMES IND LO REF LO REF LOCAL NETWORK 10 LOGIC LOW HEAT IND MED HEAT MED HEAT IND PASS HTD VOLT PASSENGER BACK SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT BACK) PASSENGER COOLED SEAT SWITCH PASSENGER CUSHION SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT CUSHION) PASSENGER HEATED SEAT SWITCH PNK DRV NTC SIG PASS NTC SIG WIRE PNK WIRE RADIO/HVAC CONTROLS RED/GRN WIRE RED/LT GRN WIRE RED/WHT WIRE SEAT HEATING CONTROL MODULE (UNDER FRONT CENTER OF DRIVER SEAT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE WHT/GRY WIRE WHT/ORG WIRE WHT/PPL WIRE

BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE FUSE GROUND GRY WIRE HEATED STEERING WHEEL ON IND HEATED STEERING WHEEL SWITCH HOT AT ALL TIMES HTD WHL FUSE IGN 3 VOLT IGNITION LOGIC RADIO/HVAC CONTROLS REAR BODY FUSE BLOCK (ON LEFT REAR WHEELHOUSE) RED WIRE RED/WHT WIRE RELAY RUN RLY COIL CTRL RUN WIRE SENSOR SIG STEERING COLUMN FUSE HOLDER STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE (INSIDE STEERING WHEEL) SW LED CTRL SW SIG VIO WIRE VIO/BRN WIRE VOLT REF YEL WIRE