GMC Terrain II (2017-2021) (behind center of dash) Wiring diagrams

BACK SWITCH BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BRN/BLU WIRE COMPUTER DATA LINES SYSTEM CUSHION, BACK SWITCH DRIVER SEAT HEATING SWITCH GRN/WHT WIRE GRY/BLK WIRE HIGH TEMP IND ILL LOW TEMP IND MED TEMP IND NCA WIRE PASSENGER BACK SEAT HEATING ELEMENT PASSENGER CUSHION SEAT HEATING ELEMENT PASSENGER SEAT HEATING SWITCH RED/YEL WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE

BACK SWITCH BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/PPL WIRE COMPUTER DATA LINES SYSTEM CUSHION, BACK SWITCH DRIVER BACK SEAT HEATING ELEMENT DRIVER CUSHION SEAT HEATING ELEMENT DRIVER SEAT HEATING SWITCH DRV HEATED BACK NTC SIG DRV HEATED SEAT ELEMENT CTRL DRV HEATED SEAT ELEMENT LO REF DRV HEATED SEAT NTC LO REF DRV HEATED SEAT NTC SIG DRV SEAT VENT MOTOR CTRL 1 FRONT SEAT HEATING CONTROL MODULE FRT HT SW FUSE GRN/BLU WIRE GRN/PPL WIRE GRN/WHT WIRE GRY/BLK WIRE HIGH TEMP IND HOT AT ALL TIMES HTD/SEAT FUSE ILL INSTRUMENT PANEL FUSE BLOCK LOCAL INTERCONNECT N/W SERIAL DATA BUS 2 LOW TEMP IND MED TEMP IND NCA WIRE PASS HEATED BACK NTC LO REF PASS HEATED BACK NTC SIG PASS HEATED SEAT ELEMENT CTRL PASS HEATED SEAT ELEMENT LO REF PASS HEATED SEAT NTC LO REF PASS HEATED SEAT NTC SIG PASS SEAT VENT MOTOR CTRL 1 PPL/WHT WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE UNDERHOOD FUSE BLOCK WHT/BLU WIRE WHT/GRY WIRE YEL/GRY WIRE

BACK SWITCH BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BRN/BLU WIRE CDST- VENT FUSE COMPUTER DATA LINES SYSTEM CUSHION, BACK SWITCH DR/SEAT/ VENT FUSE DRIVER BACK SEAT BLOWER MOTOR DRIVER CUSHION SEAT BLOWER MOTOR DRV SEAT VENT MOTOR CTRL 1 GRN/PPL WIRE GRN/WHT WIRE GRY/BLK WIRE HIGH TEMP IND HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT ILL LOGIC LOW TEMP IND MED TEMP IND NCA WIRE PASS SEAT VENT MOTOR CTRL 1 PASSENGER BACK SEAT BLOWER MOTOR PASSENGER BACK SEAT HEATING ELEMENT PASSENGER CUSHION SEAT BLOWER MOTOR PASSENGER CUSHION SEAT HEATING ELEMENT PASSENGER SEAT HEATING SWITCH PPL/BLK WIRE PPL/GRY WIRE PPL/WHT WIRE RED/YEL WIRE UNDERHOOD FUSE BLOCK WHT/BLU WIRE WHT/GRY WIRE

ACTIVE GRILLE AIR SHUTTER ACTUATOR 1 AMBIENT LIGHT/ SUNLOAD SENSOR BATTERY SAVER RELAY 1 BLK WIRE BRN WIRE COLLISION ALERT INDICATORS DATA LINK CONNECTOR DIODES ENGINE HOOD SWITCH GMC HEADLAMP SWITCH HORN SWITCH HVAC CONTROL MODULE IGNITION MAIN RELAY IGNITION MODE SWITCH LEFT FRONT SIDE MARKER LAMP LEFT FRONT TURN SIGNAL LAMP LEFT HEADLAMP BALLAST LEFT HEADLAMP CONTROL MODULE LEFT HEADLAMP COOLING FAN LEFT HEADLAMP LEVELING ACTUATOR LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LEFT PARK DAYTIME RUNNING LAMP LEFT STEERING WHEEL CONTROLS SWITCH LIFTGATE UNLATCH RELAY MOBILE DEVICE WIRELESS CHARGER MODULE NCA WIRE RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH REAR DEFOGGER RELAY REAR WINDOW WASHER PUMP REAR WINDOW WASHER PUMP RELAY REAR WIPER RELAY RETAINED ACCESSORY POWER RELAY RIGHT STEERING WHEEL CONTROLS SWITCH SERIAL DATA GATEWAY MODULE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE TURN SIGNAL/ MULTI-FUNCTION SWITCH W/ ONSTAR W/O START STOP SYSTEM WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER PUMP WINDSHIELD WASHER PUMP RELAY

ACCESSORY DC/ AC POWER INVERTER MODULE BATTERY BATTERY SENSOR MODULE BLK WIRE BODY CONTROL MODULE CENTER CONSOLE COMPARTMENT LAMP CENTER CONSOLE CUPHOLDER ACCENT LAMP CENTER CONSOLE REAR ACCESSORY POWER RECEPTACLE CENTER CONSOLE REAR USB RECEPTACLE CHEVROLET CIGARETTE LIGHTER RECEPTACLE DRIVE MODE SELECT SWITCH DRIVER SEAT HEATING SWITCH GMC HAZARD WARNING SWITCH HEADLAMP CONTROL MODULE HORN ASSEMBLY INSTRUMENT PANEL ACCESSORY POWER LEFT REAR SEAT HEATING SWITCH NCA WIRE PARK BRAKE SWITCH PARKING ASSIST ON/OFF SWITCH PASSENGER SEAT HEATING SWITCH RIGHT FRONT SIDE MARKER LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP BALLAST RIGHT HEADLAMP CONTROL MODULE RIGHT HEADLAMP COOLING FAN RIGHT HEADLAMP LEVELING ACTUATOR RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT INSTRUMENT PANEL ACCENT LAMP RIGHT LOW BEAM HEADLAMP RIGHT PARK DAYTIME RUNNING LAMP RIGHT REAR SEAT HEATING SWITCH TRANSMISSION RANGE SELECTOR CONTROLS TRANSMISSION SHIFT LEVER TRANSMISSION SHIFT LEVER POSITION INDICATOR W/ SMOKER'S PACKAGE W/ START/STOP SYSTEM W/O SMOKER'S PACKAGE W/O START/STOP SYSTEM

1.5L TURBO, 2.0L TURBO 1.6L TURBO DIESEL 6 SPEED 9 SPEED ACTIVE NOISE CANCELLATION MODULE AUDIO AMPLIFIER AUTOMATIC TRANSMISSION ASSEMBLY CONTROL SOLENOID VALVE ASSEMBLY AUXILIARY AUDIO INPUT AUXILIARY HEATER COOLANT PUMP BLK WIRE BLK/WHT WIRE BLOWER MOTOR ENGINE CONTROL MODULE ENGINE OIL LEVEL SWITCH EXHAUST PARTICULATE MATTER SENSOR HVAC CONTROLS IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 IGNITION COIL 4 INFO DISPLAY MODULE INSTRUMENT CLUSTER INTAKE MANIFOLD RUNNER VALVE ACTUATOR MULTI-FUNCTION INTAKE AIR SENSOR NITROGEN OXIDES SENSOR 1 RADIO STARTER PINION SOLENOID ACTUATOR RELAY STARTER RELAY TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE TRANSMISSION CONTROL MODULE USB RECEPTACLE W/ ACTIVE NOISE W/ ONSTAR W/ START/ STOP SYSTEM W/O ACTIVE NOISE W/O START STOP SYSTEM

BLK WIRE BLU WIRE BLU/RED WIRE BRN WIRE GRN WIRE GRN/RED WIRE GRY WIRE HDL-WHL FUSE HEATED STEERING WHEEL IND HEATED STEERING WHEEL SWITCH HIGH CTRL HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INDICATOR DIMMING CTRL LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC NCA WIRE ORG/ WIRE PPL/BLK WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SENS SIG STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE SW SIG UNDERHOOD FUSE BLOCK VOLT REF WHT WIRE

BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRY WIRE BLU WIRE BLU/GRN WIRE BLU/RED WIRE CELL COAX COMPUTER DATA LINES SYSTEM DOWN ETHERNET BUS 4 (-) GRN/ORG WIRE GRY WIRE GRY/ORG WIRE GRY/WHT WIRE GRY/YEL WIRE HIGH SPD GMLAN LEFT LEFT FRONT MOBILE TELEPHONE MICROPHONE LOGIC LOW REF MICROPHONE (-) LOW REF MICROPHONE SIG NCA WIRE POWER DISTRIBUTION SYSTEM RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RED/BLU WIRE RED/BRN WIRE REF RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH SEEK DOWN SEEK UP SEL SERIAL DATA (-) 9 SIG STEERING WHEEL AIR BAG COIL TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE TELEPHONE VOICE LOW REF VOICE SIGNAL VOL (-) W/ ONSTAR W/O ONSTAR WHT WIRE WHT/GRN WIRE

BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRY WIRE BLU WIRE BLU/GRN WIRE BLU/RED WIRE CELL COAX COMPUTER DATA LINES SYSTEM DOWN ETHERNET BUS 4 (-) GRN/ORG WIRE GRY WIRE GRY/ORG WIRE GRY/WHT WIRE GRY/YEL WIRE HIGH SPD GMLAN LEFT LEFT FRONT MOBILE TELEPHONE MICROPHONE LOGIC LOW REF MICROPHONE (-) LOW REF MICROPHONE SIG NCA WIRE POWER DISTRIBUTION SYSTEM RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RED/BLU WIRE RED/BRN WIRE RED/PPL WIRE REF RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH SEEK DOWN SEEK UP SEL SERIAL DATA (-) 9 SIG STEERING WHEEL AIR BAG COIL TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE TELEPHONE VOICE LOW REF VOICE SIGNAL VOL (-) W/ ONSTAR W/O ONSTAR WHT WIRE WHT/GRN WIRE

BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/RED WIRE BLU/PPL WIRE BLU/WHT WIRE COMPUTER DATA LINES SYSTEM GRN/BLU WIRE GRN/BRN WIRE GRN/WHT WIRE GRY WIRE HIGH HEAT IND HOT AT ALL TIMES ILL LEFT REAR BACK SEAT HEATING ELEMENT LEFT REAR CUSHION SEAT HEATING ELEMENT LEFT REAR SEAT HEATING SWITCH LOW HEAT IND LR CUSHION NTC LO REF LR CUSHION NTC SIG LR HTD SEAT CUSHION ELEMENT LO REF LR HTD SEAT ELEMENT CTRL LR HTD SEAT CUSHION ELEMENT CTRL BATT POS VOLT LR SEAT BACK NTC LO REF LR SEAT BACK NTC SIG MED HEAT IND NCA WIRE PPL/BLK WIRE REAR BODY FUSE BLOCK REAR SEAT HEATING CONTROL MODULE RED WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE RIGHT REAR BACK SEAT HEATING ELEMENT RIGHT REAR CUSHION SEAT HEATING ELEMENT RIGHT REAR SEAT HEATING SWITCH RR CUSHION NTC LO REF RR CUSHION NTC SIG RR HTD SEAT CUSHION ELEMENT LO REF RR HTD SEAT ELEMENT CTRL RR HTD SEAT CUSHION ELEMENT CTRL RR HTD/ SEAT 1 FUSE RR HTD/ SEAT 2 FUSE RR SEAT BACK NTC LO REF RR SEAT BACK NTC SIG SEAT BACK SWITCH SEAT CUSHION, BACK SWITCH SERIAL DATA BUS 2 WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE