GMC Terrain II facelift (2021-2024) Computer data lines circuit

BATTERY POSITIVE VOLTAGE BLK WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE DATA LINK CONNECTOR (BELOW STEERING COLUMN) GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE HANDS-FREE LIFTGATE SENSOR CONTROL MODULE HI SPD GMLAN SER DATA (+) 5 HI SPD GMLAN SER DATA (-) 2 HIGH SPEED GMLAN SERIAL DATA (+) 8 HIGH SPEED GMLAN SERIAL DATA (+) 9 HIGH SPEED GMLAN SERIAL DATA (-) 11 HIGH SPEED GMLAN SERIAL DATA (-) 12 HIGH SPEED GMLAN SERIAL DATA (-) 13 HIGH SPEED GMLAN SERIAL DATA (-) 8 GROUND HOT AT ALL TIMES HVAC CONTROL HVAC CONTROL MODULE HVAC CONTROLS INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT PANEL FUSE BLOCK LEFT SIDE OBJECT SENSOR MODULE LIN BUS 1 LO SPD GMLAN LO SPD GMLAN SER DATA LOW SPEED GMLAN SERIAL DATA LOW SPEED GMLAN SERIAL DATA 2 LOW SPEED GMLAN SERIAL DATA 3 MODULE LIN BUS 2 NCA WIRE RED/GRN WIRE RED/VIO WIRE RIGHT SIDE OBJECT SENSOR MODULE SER DATA SER DATA COMM ENABLE SERIAL DATA GATEWAY MODULE (CENTER OF DASH) WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WINDSHIELD TEMPERATURE, INSIDE MOISTURE SENSOR

ACCY IGN VOLT BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE DRIVER SEAT MEMORY CONTROL MODULE GRN WIRE GRN/BRN WIRE GRN/WHT WIRE GRY/GRN WIRE HI SPD GMLAN HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (-) 2 HIGH SPEED EXTENSION BUS 1 TERMINATING RESISTOR KEYLESS ENTRY CONTROL MODULE LIFTGATE CONTROL MODULE LIN BUS 1 LO SPD GMLAN PARKING ASSIST CONTROL MODULE (IF EQUIPPED) (RIGHT SIDE OF LUGGAGE AREA) PASSENGER PRESENCE MODULE SER DATA SER DATA (+) 2 SER DATA (+) 8 SER DATA (-) (1) SER DATA COMM ENABLE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

AMBIENT LIGHT/ SUNLOAD SENSOR BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE DRIVER SEAT HEATING SWITCH DRIVER WINDOW MOTOR MODULE DRIVER WINDOW SWITCH FRONT SEAT HEATING CONTROL MODULE GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE LEFT REAR SEAT HEATING SWITCH LEFT REAR WINDOW SWITCH LIN BUS 1 LIN BUS 2 LIN BUS 3 LIN BUS 4 LIN BUS 5 PASSENGER SEAT HEATING SWITCH PASSENGER WINDOW SWITCH REAR SEAT HEATING CONTROL MODULE RIGHT REAR SEAT HEATING SWITCH RIGHT REAR WINDOW SWITCH SUNROOF CONTROL MODULE TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO/YEL WIRE W/O ONSTAR WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

6 SPEED A/T ACCY IGN VOLT ACCY WAKEUP ACCY WAKEUP SER DATA ACTIVE GRILLE AIR SHUTTER 1 ACTUATOR BATTERY SENSOR MODULE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BODY CONTROL MODULE COMM ENABLE COOLING FAN MOTOR FRONT OF RADIATOR) GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE HI SPD GMLAN HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (-) 2 LIN BUS 1 LIN BUS 2 LIN BUS 3 LIN BUS 4 LIN BUS 5 LO SPD GMLAN NCA WIRE SER DATA SER DATA (-) (1) SER DATA COMM ENABLE TRANSMISSION CONTROL MODULE UNDERHOOD FUSE BLOCK VIO/YEL WIRE W/ FORWARD COLLISION ALERT W/O FORWARD COLLISION ALERT WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

6 SPEED A/T ACCY WAKEUP SER DATA BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE EXCEPT CALIFORNIA GRN WIRE GRN/VIO WIRE GRY/GRN WIRE HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (+) 3 HI SPD GMLAN SER DATA (-) 7 LIN BUS 1 VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

ACCY WAKEUP SER DATA BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLU WIRE ETHERNET BUS 7 (-) FUEL PUMP DRIVER CONTROL MODULE GRN WIRE GRN/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE HI SPD GMLAN SER DATA (+) 3 HI SPD GMLAN SER DATA (-) 7 INSTRUMENT CLUSTER LIN BUS 1 LO SPD GMLAN SER DATA 2 RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL TRANSMISSION RANGE SELECTOR CONTROLS VIDEO PROCESSING CONTROL MODULE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLK WIRE BRN/BLU WIRE BUS 4 COMM ENABLE ETHERNET ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) GRN WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE HI SPD GMLAN INFO DISPLAY MODULE LO SPD GMLAN LO SPD GMLAN SER DATA 2 LOW LEVEL MID/HIGH LEVEL RADIO SER DATA SER DATA (+) 2 SER DATA (+) 9 TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE (CENTER OF DASH) W/ ONSTAR W/O ONSTAR WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

AUDIO AMPLIFIER (CENTER OF DASH) BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLK WIRE DATA BUS - GRN WIRE GRY/BLK WIRE GRY/GRN WIRE HEAD-UP DISPLAY MODULE HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (+) 9 LOW SPEED GMLAN SERIAL DATA HI SPD GMLAN SER DATA (-) 2 HI SPD GMLAN SER DATA (-) 8 HI SPD GMLAN SER DATA (-) 9 HOT W/ IGNITION MAIN RELAY ENERGIZED LO SPD GMLAN MOST SER RUN/CRANK IGNITION 1 VOLTAGE SER DATA (+) 2 SER DATA COMM ENABLE SERIAL DATA GATEWAY MODULE (CENTER OF DASH) UNDERHOOD FUSE BLOCK VIO/GRN WIRE W/O SEMI AUTOMATIC STEERING ADVANCED PARKING AID WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE YEL WIRE