GMC Terrain II facelift (2021-2024) blu/brn Wiring diagrams

BLK WIRE BLU/BLK WIRE BLU/BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY GRY/GRN WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN SERIAL DATA 2 RED/BRN WIRE RED/GRN WIRE TRANSMISSION RANGE SELECTOR CONTROLS UNDERHOOD FUSE BLOCK UP/DOWN TRANSMISSION MANUAL SHIFT SWITCH VIO/GRN WIRE VIO/YEL WIRE WHT WIRE

BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRY WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BUS 2 COIL CTRL COMPUTER DATA LINES SYSTEM DRIVE MODE SELECT SWITCH GRN/BLU WIRE GRY/VIO WIRE HI SPD GMLAN SER DATA - HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL FUSE BLOCK LOGIC NETWORK NETWORK BUS 2 PARK LOCK SOL CTRL PARK POSITION SWITCH POWER SUPPLY TRANSFORMER PRESS BRAKE RAP RLY RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE SHIFT POS SIG SIG GND SPLY TAP UP/TAP DOWN SW SIG TOW/HAUL SWITCH TRANSMISSION RANGE SELECTOR CONTROLS TRANSMISSION SHIFT LEVER TRANSMISSION SHIFT LEVER POSITION INDICATOR TRANSMISSION SHIFT LOCK CONTROL SOLENOID ACTUATOR TRANSMISSION SHIFT POS INDICATOR 2 CONTROL SHIFT SELECT SW PERFORMANCE SIG UNDERHOOD FUSE BLOCK UP/DOWN TRANSMISSION MANUAL SHIFT SWITCH VIO/BLK WIRE VIO/GRN WIRE VIO/YEL WIRE VOLT 2 WHT WIRE WHT/VIO 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

AMBIENT LIGHT SENSOR SIG AMBIENT LIGHT/ SUNLOAD SENSOR AUTO AUTOMATIC HIGH BEAM ON/OFF SW SIG BATTERY POSITIVE VOLTAGE BLK WIRE BLK/GRN WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRN/VIO WIRE COMPUTER DATA LINES SYSTEM FRONT FOG LAMP CTRL FRONT FOG LAMP SWITCH FT FOG LAMP SW SIG GRN/BRN WIRE GRN/GRY WIRE GROUND GRY/BLU WIRE HDLP SW FLASH HDLP SW OFF SIG HDLP SW ON SIG HDLP SW PARK LAMP SIG HEAD HEADLAMP SWITCH HI BEAM SELECT SW HI BEAM SIG HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HVAC CONTROL MODULE (TOP CENTER OF DASH) INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DRL CTRL LEFT HEADLAMP RLY CTRL LEFT LOW BEAM SPLY CTRL LOW REF OFF PARK RED/BLU WIRE RED/GRN WIRE RIGHT HEADLAMP LOW BEAM CTRL RIGHT HEADLAMP RLY CTRL RIGHT PARK LAMP CTRL TURN SIGNAL/ MULTI-FUNCTION SWITCH W/O RETRACTABLE HEAD-UP DISPLAY W/ RETRACTABLE HEAD-UP DISPLAY WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE YEL/GRN WIRE

BATTERY FUSE BLOCK BLK WIRE BLU/BRN WIRE BRN/VIO WIRE GRY/BLU WIRE HOT AT ALL TIMES LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP CONTROL MODULE LEFT HEADLAMP RELAY LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LEFT PARK DAYTIME RUNNING LAMP NCA WIRE RED WIRE RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP CONTROL MODULE RIGHT HEADLAMP RELAY RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP RIGHT PARK DAYTIME RUNNING LAMP UNDERHOOD FUSE BLOCK WHT WIRE WHT/BRN WIRE YEL WIRE YEL/GRN WIRE YEL/GRY WIRE

BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLU/BRN WIRE BLU/YEL WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DISABLE SW SIG DRIVER INFORMATION CENTER DISPLAY FRT PARKING LEFT/RIGHT/MID SENS FRT PARKING LT MID SENS FRT PARKING RT CORNER SENS FRT PARKING RT MID SENS FRT PARKING SENS LOW REF GMLAN SER DATA (+) 2 GND GMLAN SER DATA (-) (2) GRN WIRE GRN/BRN WIRE GRY WIRE GRY/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LED DISABLE SIG LEFT "C" PILLAR) LEFT FRONT MIDDLE PARKING ASSIST SENSOR LEFT FRONT OUTER PARKING ASSIST SENSOR LEFT FRONT SIDE PARKING ASSIST SENSOR LEFT REAR MIDDLE PARKING ASSIST SENSOR LEFT REAR OUTER PARKING ASSIST SENSOR LF SUPP OBJECT SENS SIG FRT PARKING LT CORNER SENS LO SPD GMLAN SER DATA LOGIC LR CORNER OBJECT SENS SIG LR MIDDLE OBJECT SENS SIG OBJECT SENS CTRL OBJECT SENS LOW REF PARKING ASSIST CONTROL MODULE (RIGHT SIDE OF LUGGAGE AREA) PARKING ASSIST DISABLE SWITCH PARKING ASSIST IND PARKING ASSIST ON/OFF SWITCH POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER (W/ START/STOP SYSTEM) (LOWER CENTER OF DASH) REAR PARK ASSIST DIS SIG RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE RF SUPP OBJECTSENS SIG RIGHT FRONT MIDDLE PARKING ASSIST SENSOR RIGHT FRONT OUTER PARKING ASSIST SENSOR RIGHT FRONT SIDE PARKING ASSIST SENSOR RIGHT REAR MIDDLE PARKING ASSIST SENSOR RIGHT REAR OUTER PARKING ASSIST SENSOR RR CORNER OBJECT SENS SIG RR MIDDLE OBJECT SENS SIG VIO/GRY WIRE VIO/WHT WIRE W/ START/STOP SYSTEM W/O START/STOP SYSTEM WHT WIRE WHT/GRY WIRE YEL WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

A/C PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR ACCEL PP LOW REF 1 ACCEL PP LOW REF 2 AIR CONDITIONING SYSTEM AIR TEMP SENS SIG AMBIENT AIR TEMP SENS SIG AMBIENT AIR TEMPERATURE SENSOR APP POS SIG 1 APP SIG (2) BATT POS VOLT BLK/BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/RED WIRE BRAKE BOOSTER VACUUM SENSOR BRAKE PEDAL POSITION SENSOR BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DOOR LOCKS, ANTI-THEFT SYSTEMS ENG OIL PRESS SENSOR SIG ENG OIL PRESS SNS L REF ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) EVAP PURGE SOL VLV CNTRL GMLAN SERIAL DATA (+) 1 A/C COMPRESSOR GMLAN SERIAL DATA (+) 3 PARK/NEUTRAL SIG 1 GMLAN SERIAL DATA (+) 7 GMLAN SERIAL DATA (+) 7 SENS SIG GMLAN SERIAL DATA (-) 1 CHECK ENGINE IND CTRL GMLAN SERIAL DATA (-) 3 CRUISE/ETC/TCC BRAKE SIG GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE HOOD OPEN SW SIG IGNITION 1 VOLT MAF SENS SIG MAIN RELAY FUSED SPLY 2 WAKEUP SERIAL DATA MAIN RLY FUSED SVIOY 1 MAIN RLY FUSED SVIOY 3 RED/WHT WIRE RELAY COIL CTRL STARTER RELAY CNTRL FUEL PUMP PRI RLY CNTRL STARTING/CHARGING SYSTEM TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/BRN WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

"CHECK ENGINE" IND CTRL A/C COMPRESSOR CLUTCH RLY CTRL A/C REFRIGERANT PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR ACCELERATOR PEDAL POS LOW REF 1 ACCELERATOR PEDAL POS LOW REF 2 ACCELERATOR PEDAL POSITION SENSOR ACCESSORY WAKEUP SER DATA AIR CONDITIONING SYSTEM AMBIENT AIR TEMP SENS SIG ANTI-LOCK BRAKES SYSTEM APP SIG (1) APP SIG (2) BATT POS VOLT BLK/BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRY WIRE BRAKE PEDAL POSITION SENSOR BRK POS SENS LOW REF BRK POS SENS SIG BRK VACUUM SENS SIG BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG DOOR LOCKS, ANTI-THEFT SYSTEMS DRV MODE SW SIG ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) EVAPORATIVE EMISSION VENT SOLENOID VALVE FUEL PUMP PRIMARY RELAY CTRL FUSED SPLY VOLT 1 FUSED SPLY VOLT 2 FUSED SPLY VOLT 3 GRN WIRE GRN/GRY WIRE GRN/WHT WIRE GRY WIRE GRY/RED WIRE HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (+) 3 HI SPD GMLAN SER DATA (-) 7 HOOD OPEN SW SIG HOT AT ALL TIMES HTR RLY CTRL HUMIDITY SENS SIG INTAKE AIR TEMP SENS SIG MASS AIR FLOW SENS SIG POWERTRAIN RELAY COIL CTRL RED/VIO WIRE RED/WHT WIRE RUN/CRANK IGNITION 1 VOLT SENS HI REF BANK 1 STARTER ENABLE RLY CTRL STARTER PINION SOL RLY CTRL STARTING/CHARGING SYSTEM TRANSMISSION PARK/NEUTRAL SIG 1 TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/VIO WIRE YEL/WHT WIRE

A/C COMPRESSOR CLUTCH RELAY AMBIENT AIR TEMPERATURE SENSOR AUXILIARY COOLANT PUMP RELAY BATT POS BATTERY FUSE BLOCK BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BRAKE BOOSTER VACUUM SENSOR BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM ENGINE CONTROLS IGNITION RELAY EVAP CANISTER FUEL LEVEL SENSOR FUEL PRESSURE SENSOR FUEL PUMP FUEL PUMP DRIVER CONTROL MODULE (UNDER LEFT SIDE OF VEHICLE) FUEL PUMP, LEVEL SENSOR ASSEMBLY FUEL TANK PRESSURE SENSOR GMLAN (-) 7 GRN WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/RED WIRE HOT ALL ALL TIMES HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLTAGE PRIMARY FUEL LEVEL SENSOR PUMP CONTROL RED WIRE RED/BLU WIRE REF RELAY CONTROL SECONDARY FUEL LEVEL SENSOR SENS LOW SHIELD GROUND SNS LOW REF SNS LOW REF 2 SNS SIG UNDERHOOD FUSE BLOCK VENT SOL CTRL VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VOLT PHASE 2 VOLT PHASE 3 WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/VIO WIRE YEL WIRE YEL/GRY WIRE YEL/RED WIRE