Buick LaCrosse II (2009-2013) gmlan serial data Wiring diagrams

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

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

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

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

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

AUDIO JACK AUDIO SIG + AUX AUDIO JACK AUX AUDIO SIG AUX DETECTION SIG AUXILIARY AUDIO INPUT (W/ AUDIO INTERFACE) BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CENTER RESET SIG CENTER STACK SIG CGI - COMMON SIG COMPUTER DATA LINES SYSTEM DETECTION SIG DK BLU WIRE DRAIN WIRE GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND GRY WIRE GRY/DK GRN WIRE JACK LEFT (+) JACK RIGHT (+) LEFT AUX SIG (2) LEFT SIG (2) LOCAL NETWORK 10 LT GRN WIRE LT GRN/YEL WIRE MULTIMEDIA PLAYER INTERFACE MODULE (W/ EQUIPPED) NCA WIRE PPL PPL W/ NAVIGATION RED/DK BLU WIRE RIGHT AUX SIG (2) RIGHT SIG 2 VIO WIRE W/ AUDIO INTERFACE W/O AUDIO INTERFACE W/O NAVIGATION PPL YEL WIRE

AMPLIFIER CTRL AUDIO SIG (3) AUX DET SIG BATT POS VOLT BLK WIRE BLK/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/DK BLU WIRE BRN/VIO WIRE BRN/WHT WIRE CENTER AUDIO SIG CENTER SIG CGI - COMMON SIG COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CTRL SW SIG DK BLU WIRE DK BLU/BLK WIRE DK BLU/BRN WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DRAIN WIRE DRIVER SEATBACK VIDEO DISPLAY (W/ REAR SEAT ENTERTAINMENT) FRT LO LVL SIG (-) GM LAN SER DATA GMLAN SERIAL DATA GRN WIRE GRY WIRE GRY/DK GRN WIRE HEADLIGHTS SYSTEM LEFT AUDIO SIG LEFT AUX SIG (2) LF LO LVL SIG LOW LVL (-) LOW LVL SIG (-) LR LO LVL SIG LT GRN WIRE LT GRN/BLK WIRE LT GRN/DK BLU WIRE LT GRN/YEL WIRE NCA WIRE ORG/ WIRE PASSENGER SEATBACK VIDEO DISPLAY (W/ REAR SEAT ENTERTAINMENT) PPL RADIO RED WIRE REMOTE ENABLE RF LO LVL SIG RIGHT AUDIO SIG RIGHT SIG 2 RIGHT STEERING WHEEL CONTROLS SWITCH RR LO LVL SIG SEEK DOWN SEEK UP SOURCE STACK RESET SIG STEERING WHEEL AIR BAG COIL SW REF VOLT VIDEO SYSTEM CIRCUIT VIO WIRE VIO/DK BLU WIRE VOICE LOW REF VOICE MUTE VOICE SIG VOL (-) W/ REAR SEAT ENTERTAINMENT WHT WIRE WHT/BLK WIRE WHT/VIO WIRE YEL WIRE

AUDIO JACK AUDIO SIG + AUX AUDIO JACK AUX AUDIO SIG AUX DETECTION SIG AUXILIARY AUDIO INPUT (W/ AUDIO INTERFACE) BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CENTER RESET SIG CENTER STACK SIG CGI - COMMON SIG COMPUTER DATA LINES SYSTEM DETECTION SIG DK BLU WIRE DRAIN WIRE GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND GRY WIRE GRY/DK GRN WIRE JACK LEFT (+) JACK RIGHT (+) LEFT AUX SIG (2) LEFT SIG (2) LOCAL NETWORK 10 LT GRN WIRE LT GRN/YEL WIRE MULTIMEDIA PLAYER INTERFACE MODULE (W/ EQUIPPED) NCA WIRE PPL PPL W/ NAVIGATION RED WIRE RED/DK BLU WIRE RIGHT AUX SIG (2) RIGHT SIG 2 VIO WIRE W/ AUDIO INTERFACE W/O AUDIO INTERFACE W/O NAVIGATION PPL YEL WIRE

BLK WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU/BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CENTER (DIC) COMMUNICATION COMPUTER DATA LINES SYSTEM DATA DISPLAY DK BLU WIRE DK BLU/BLK WIRE DK BLU/WHT WIRE ENABLE ENGINE FLP SENS FPP RLY CTRL FUEL PRESSURE SENSOR (IN FUEL TANK) FUEL PUMP CONTROL MODULE (RIGHT REAR CORNER OF REAR COMPT) FUSE FUSE FUSE GMLAN SERIAL GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE GRY/DK BLU WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROL RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED IGN IGN 1 VOLT INFORMATION INSTRUMENT CLUSTER LOGIC LOW REF LT GRN/DK BLU WIRE LT GRN/GRY WIRE MIL IND NCA WIRE PRESS SENS SIG RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE RUN/CRANK SECONDARY AIR INJECTION PUMP RELAY SECONDARY AIR INJECTION SOLENOLD VALVE RELAY SERIAL DATA SHIELD EXTENSION SPLY VOLT FUEL PUMP UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) USED) VIO/BLK WIRE VIO/DK BLU WIRE VIO/LT GRN WIRE WHT WIRE WHT/DK BLU WIRE YEL WIRE