GMC Terrain II (2017-2021) (left of steering column) Wiring diagrams

1.6L TURBO DIESEL 1.5L TURBO ACCESSORY WAKEUP SERIAL DATA BLK WIRE BLU/BLK WIRE BLU/BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY E SHIFT FUSE GRY/GRN WIRE HI SPD GMLAN SER DATA (+) 3 HI SPD GMLAN SER DATA (-) 7 HI SPD GMLAN SER DATA (-) 7 ACCESSORY WAKEUP SERIAL DATA HI SPD GMLAN SER DATA (-) 7 BATT POS VOLT HOT W/ IGNITION MAIN RELAY ENERGIZED HOT W/ REDUCTANT CONTROL MODULE RELAY 2 ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN SERIAL DATA 2 NOX SOOT FUSE PPL/BLU WIRE PPL/GRN WIRE PPL/YEL WIRE RED/BRN WIRE RED/GRN WIRE RUN/CRANK IGNITION 1 VOLT TRANSMISSION RANGE SELECTOR CONTROLS UNDERHOOD FUSE BLOCK UP/DOWN TRANSMISSION MANUAL SHIFT SWITCH VAR/FUNC FUSE WHT WIRE

ACCESSORY WAKEUP SERIAL DATA ANALOG SIG 1 ANALOG SIG 2 BATT POSITIVE VOLT BLK/BRN WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CLUTCH A CTRL CLUTCH B CTRL CLUTCH C CTRL CLUTCH D CTRL CLUTCH E CTRL COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ECM/TCM FUSE GRN/GRY WIRE GRN/PPL WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) 1 (PINS: 39 TO 48 NOT USED) 49 HOT W/ IGNITION MAIN RELAY ENERGIZED IGN MODE SW MODE CTRL IN SPD SIG INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LO SPD GMLAN SERIAL DATA 2 LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 21 LOGIC OUT SPD SIG PARK LOCK SOL CTRL PARK SW 2 SIG PARK SW SIG PPL PPL/BLK WIRE PPL/GRN WIRE PPL/WHT WIRE PPL/YEL WIRE RED/GRN WIRE RUN/CRANK IGNITION 1 VOLT SIG GND TCC/CLUTCH SOL CTRL TCM FUSE TRANS CLUTCH F CTRL TRANS CLUTCH G CTRL TRANS CLUTCH H CTRL TRANS HI SIDE DRV 1 SIG TRANS HI SIDE DRV 2 SIG TRANS INTERMEDIATE SPD SIG TRANS LEVEL TEMP SENS TRANS OIL TEMP SENS LO REF TRANS OIL TEMP SENS SIG TRANSMISSION CONTROL MODULE (FRONT OF TRANSMISSION) UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE

BLK WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE DATA BUS 18 DATA BUS 9 DATA LINK CONNECTOR (BELOW STEERING COLUMN) DLC LEFT FUSE GRN WIRE GRN/BRN WIRE GRN/YEL WIRE HANDS-FREE LIFTGATE SENSOR CONTROL MODULE HI SPD GMLAN SER DATA (+) 5 HI SPD GMLAN SER DATA (-) 2 HOT AT ALL TIMES HVAC CONTROL MODULE HVAC CONTROLS INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT PANEL FUSE BLOCK LEFT SIDE OBJECT SENSOR MODULE LO SPD GMLAN LO SPD GMLAN SER DATA NETWORK SER RED/PPL WIRE RIGHT SIDE OBJECT SENSOR MODULE SER DATA SER DATA COMM ENABLE WHT WIRE WHT/BLU WIRE

ACTIVE NOISE CANCELLATION MODULE AUDIO AMPLIFIER BATT POSITIVE VOLT BLK WIRE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE CYB SEC FUSE DATA DATA BUS - GRN WIRE GRY/GRN WIRE GRY/PPL WIRE HEADLAMP LEVELING CONTROL MODULE HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (+) 2 LO SPD GMLAN SER DATA HI SPD GMLAN SER DATA (-) 2 HI SPD GMLAN SER DATA (-) 8 HI SPD GMLAN SER DATA (-) 8 LO SPD GMLAN SER DATA HI SPD GMLAN SER DATA (-) 9 HIGH SPEED BUS TERMINATING RESISTOR HIGH SPEED EXTENSION BUS 1 TERMINATING RESISTOR HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LO SPD GMLAN LO SPD GMLAN SER DATA 2 MOST SER RED/GRN WIRE SER DATA (+) 2 SER DATA COMM ENABLE SERIAL DATA GATEWAY MODULE (CENTER OF DASH) W/ ONSTAR W/ PREMIUM BRANDED AMPLIFIER W/O ONSTAR W/O PREMIUM BRANDED AMPLIFIER WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE YEL WIRE

AMBIENT LIGHTING CTRL 1 BATT POS VOLT BCM 7 FUSE BLK WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM COURTESY LAMPS SW SIG REAR COMPARTMENT LID LAMP CTRL DEFEAT SW SIG DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW MOTOR MODULE GRN WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES INADVERTENT PWR CTRL INSTRUMENT PANEL FUSE BLOCK INTERIOR LAMP CTRL LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LEFT SUNSHADE LEFT SUNSHADE MIRROR LAMP LF DR AJAR SW SIG LOGIC LOW SPEED GMLAN SERIAL DATA LR DR AJAR SW SIG NETWORK BUS 3 NETWORK BUS 4 PASS DR AJAR SW SIG PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW SWITCH REAR COMPARTMENT COURTESY LAMP RED/BRN WIRE RED/GRY WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RIGHT SUNSHADE RIGHT SUNSHADE MIRROR LAMP RR DR AJAR SW SIG WHT WIRE WHT/BRN WIRE WHT/YEL WIRE

1.5L TURBO, 2.0L TURBO 1.6L TURBO DIESEL ADAPTIVE CRUISE IND ADAPTIVE CRUISE SWITCH APP POS SIG 1 APP SIG (2) BATT POS VOLT BATT POSITIVE VOLT BCM 7 FUSE BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/PPL WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRK APPLY SENS CTRL BRK APPLY SENS SIG BRK POS SENS LOW REF BRK POS SENS SIG BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CANCEL SWITCH CHEVROLET/ GMC COMPUTER DATA LINES SYSTEM CRUISE IND CRUISE/ETC/TCC BRAKE SIG DATA 2 (+) DRIVER INFORMATION CENTER DISPLAY ECM FUSE ENGINE CONTROL MODULE FORWARD COLLISION ALERT WARNING SWITCH GMLAN GMLAN SERIAL DATA (-) 3 GP UP/DOWN SWITCH GRN/WHT WIRE GROUND GRY/GRN WIRE HOT ALL ALL TIMES HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT STEERING WHEEL CONTROLS SWITCH LO SPD LOGIC LOW REF LOW REF (1) LOW REF 2 RED/BRN WIRE RED/GRY WIRE RED/WHT WIRE RES+ SER SERIAL DATA (-) (1) SET- SET/COAST/RESUME/ ACCELERATE SW SIG STEERING WHEEL AIR BAG COIL TB SENS SIG THROTTLE ACTR CTRL CLOSE THROTTLE ACTR CTRL OPEN THROTTLE POSITION SENS 5 VOLT REF THROTTLE POSITION SENS LOW REF UNDERHOOD FUSE BLOCK UP/DOWN SW SIG WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

1.5L TURBO, 2.0L TURBO 1.6L TURBO DIESEL ADAPTIVE CRUISE IND ADAPTIVE CRUISE SWITCH APP POS SIG 1 APP SIG (2) BATT POS VOLT BATT POSITIVE VOLT BCM 7 FUSE BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/PPL WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRK APPLY SENS CTRL BRK APPLY SENS SIG BRK POS SENS LOW REF BRK POS SENS SIG BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CANCEL SWITCH COMPUTER DATA LINES SYSTEM CRUISE IND CRUISE/ETC/TCC BRAKE SIG DATA 2 (+) DRIVER INFORMATION CENTER DISPLAY ECM FUSE ENGINE CONTROL MODULE FORWARD COLLISION ALERT WARNING SWITCH GMLAN GMLAN SERIAL DATA (-) 3 GP UP/DOWN SWITCH GRN WIRE GRN/WHT WIRE GROUND GRY/GRN WIRE HOT ALL ALL TIMES HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT STEERING WHEEL CONTROLS SWITCH LO SPD LOGIC LOW REF LOW REF (1) LOW REF 2 RED/BRN WIRE RED/GRY WIRE RED/WHT WIRE RES+ SER SERIAL DATA (-) (1) SET- SET/COAST/RESUME/ ACCELERATE SW SIG STEERING WHEEL AIR BAG COIL TB SENS SIG THROTTLE ACTR CTRL CLOSE THROTTLE ACTR CTRL OPEN THROTTLE POSITION SENS 5 VOLT REF THROTTLE POSITION SENS LOW REF UNDERHOOD FUSE BLOCK UP/DOWN SW SIG W/ FORWARD COLLISION ALERT WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

AMBIENT LIGHT SENSOR SIG AMBIENT LIGHT/ SUNLOAD SENSOR AUTO BATTERY POSITIVE VOLTAGE BCM 1 FUSE BCM 3 FUSE BCM 4 FUSE BLK WIRE BLK/GRN WIRE BLU WIRE BLU/GRY WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRN/PPL WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DIMMER SW HI BEAM SIG DRL RLY CTRL FOG LAMP RLY CTRL FRONT FOG LAMP SW SIG FRONT FOG LAMP SWITCH GRN/BRN WIRE GRN/GRY WIRE GROUND GRY/BRN WIRE HDLP AUTO HI BEAM DIM CTRL HDLP HI BEAM RLY CTRL HDLP SW FLASH TO PASS SIG HDLP SW OFF SIG CTRL HDLP SW ON SIG HDLP SW PARK LAMP SIG HEAD HEADLAMP SWITCH HI SPD GMLAN SERIAL DATA HOT AT ALL TIMES HVAC CONTROL MODULE (TOP CENTER OF DASH) INSTRUMENT PANEL FUSE BLOCK LEFT LOW BEAM SPLY CTRL LEFT PARK LAMP CTRL LOW REFERENCE OFF PARK PPL/GRY WIRE REAR FOG LAMP REAR FOG LAMP SW SIG REAR FOG LAMP SWITCH RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RIGHT LOW BEAM SPLY CTRL RIGHT PARK LAMP CTRL RR FOG LAMP CTRL TURN SIGNAL/ MULTI-FUNCTION SWITCH WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/PPL WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE

AUXILIARY AUDIO INPUT BCM 8 FUSE BLK WIRE BLK/YEL WIRE BLU/GRY WIRE BLU/RED WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM DOME LAMP OFF IND CTRL GMC GRN WIRE HEADLAMP SWITCH HOT AT ALL TIMES IGNITION MODE SWITCH INDICATOR DIMMING CTRL INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL LAMP DIMMER SW SIG INSTRUMENT PANEL LAMP DIMMER SWITCH LOW REFERENCE LED BACK LIGHT DIMMING CONTROL LED BACK LIGHT DIMMING CTRL LOW SPD GMLAN SERIAL DATA BATT POS VOLT PARK BRAKE SWITCH PARKING ASSIST CONTROL MODULE PARKING ASSIST ON/OFF SWITCH PARKING BRAKE IND. RED/BRN WIRE W/ FRONT, REAR PARKING ASSIST WHT WIRE YEL WIRE YEL/GRY WIRE

AJAR SW SIG BLK WIRE BLU/PPL WIRE COMPUTER DATA LINES SYSTEM DATA BUS 3 DOOR LOCKS SYSTEM DOWN DOWN SIG DRIVER WINDOW MOTOR MODULE DRIVER WINDOW SWITCH DRV (+) DRV UP SIG EXPRESS EXPRESS SIG FT WINDOW FUSE GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES ILL INSTRUMENT PANEL FUSE BLOCK LEFT FRONT LEFT REAR LIN SERIAL LIN SERIAL DATA BUS 3 LOCKOUT INDICATOR LOGIC MTR STATUS SIG OSRVM FUSE POWER DISTRIBUTION SYSTEM RED/BRN WIRE RED/YEL WIRE RIGHT FRONT RIGHT REAR RR WDO FUSE UNLCK SIG WHT/PPL WIRE WINDOW LOCK SWITCH WINDOW SWITCH