GMC Terrain II (2017-2021) (under left headlamp assembly) Wiring diagrams

1.5L TURBO, 2.0L TURBO 1.6L TURBO DIESEL 5 VOLT REF A/C PRESS AMBIENT LIGHT/SUNLOAD SENSOR ANTI-THEFT SYSTEM BATT POS BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/WHT WIRE BRN/RED WIRE CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM COOLANT TEMP COOLING FAN COOLING FAN MOTOR (MOUNTED TO COOLING FAN SHROUD) CTRL RLY SIG DATA (-) (3) ENG COOLANT ENGINE CONTROLS SYSTEM FUSE SPLY 1 GMLAN SERIAL GRN WIRE GRN/PPL WIRE GRY WIRE HEADLIGHTS SYSTEM HTR RLY CTRL J110 (1.5L TURBO, 2.0L TURBO) LOGIC LOW REF 2 MAIN RLY PPL/BLU WIRE RADIATOR COOLANT TEMPERATURE SENSOR RED/BLU WIRE RED/WHT WIRE SENS 2 LO REF SENS LO REF SENS SIG SPD SIG TEMP SENS SIG UNDERHOOD FUSE BLOCK VOLT WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE

1.6L TURBO DIESEL 2.0L TURBO, 1.5L TURBO BATT POS VOLT BATTERY BATTERY FUSE BLOCK BATTERY SENSOR MODULE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CHARGE IND CHARGE IND CTRL COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ECM FUSE ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUSE 5 FUSE 6 FUSE 7 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GMLAN SERIAL DATA - 1 GRN/PPL WIRE GRY WIRE GRY/GRN WIRE INSTRUMENT CLUSTER LO SPD GMLAN LOGIC RED WIRE RED/BRN WIRE RED/WHT WIRE SERIAL DATA 2 SIG GND STARTER MOTOR UNDERHOOD FUSE BLOCK WHT WIRE

1.6L TURBO DIESEL A/C PRESS SENS SIG AMBIENT AIR TEMPERATURE SENSOR BATT POS BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE COMPUTER DATA LINES SYSTEM COOLANT TEMP SENS 2 LO REF COOLING FAN CTRL RLY SIG COOLING FAN MOTOR (MOUNTED TO COOLING FAN SHROUD) ECM FUSE ENG COOLANT TEMP SENS SIG COOLANT TEMP SENS SIG ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR FUSE 4 GMLAN SERIAL DATA (-) 3 GRN/PPL WIRE HOT AT ALL TIMES J110 (1.5L TURBO, 2.0L TURBO) J122 (1.5L TURBO, 2.0L TURBO) LOGIC LOW REF 2 RADIATOR COOLANT TEMPERATURE SENSOR RED/BLU WIRE RED/WHT WIRE SENS LO REF SPD SIG UNDERHOOD FUSE BLOCK VOLT WHT WIRE WHT/BLK WIRE

BLK WIRE BLU WIRE BODY CONTROL MODULE BRAKE FLUID LEVEL SWITCH CHEVROLET CHEVROLET/ GMC COOLING FAN MOTOR DRIVER DOOR ACCENT LAMP DRIVER DOOR HANDLE ACCENT LAMP DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR LOCK SWITCH DRIVER EXTERIOR DOOR HANDLE ASSEMBLY DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR- VIEW MIRROR DRIVER SEAT MEMORY SWITCH DRIVER SIDE OBJECT DETECTOR INDICATOR DRIVER WINDOW MOTOR MODULE DRIVER WINDOW SWITCH ELECTRICAL AUXILIARY HEATER ELECTRONIC BRAKE CONTROL MODULE FRONT VIEW CAMERA MODULE INSIDE REAR VIEW MIRROR INTERIOR LIFTGATE CONTROL SWITCH KEYLESS ENTRY CONTROL MODULE LEFT FRONT FOG LAMP LEFT HEADLAMP ASSEMBLY LEFT FRONT TURN SIGNAL LAMP LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR EXTERIOR DOOR HANDLE ASSEMBLY LEFT REAR WINDOW SWITCH LEFT TURN SIGNAL REPEATER LAMP NCA WIRE POWER STEERING CONTROL MODULE RAIN/ AMBIENT LIGHT SENSOR MODULE SUNROOF CONTROL MODULE TRANSMISSION RANGE CONTROL MODULE UNDERHOOD FUSE BLOCK WINDSHIELD WIPER RELAY W/ INTERIOR LAMP PACKAGE W/ MEMORY WINDSHIELD FRONT VIEW CAMERA WINDSHIELD WIPER MOTOR WINDSHIELD WIPER RELAY

"CHECK ENGINE" IND CTRL 1.6L TURBO DIESEL 1.6L TURBO DIESEL 2.0L TURBO, 1.5L TURBO 2.0L TURBO 2.0L TURBO, 1.5L TURBO AIR TEMPERATURE SENS SIG AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/PPL WIRE BLK/WHT WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/PPL WIRE BLU/WHT WIRE BRAKE FLUID LEVEL SWITCH BRN/GRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW MOTOR MODULE ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) ENGINE CONTROLS SYSTEM ENGINE OIL LEVEL SWITCH ENGINE OIL PRESSURE SENSOR FUEL LEVEL SENSOR FUEL PUMP DRIVER CONTROL MODULE FUEL PUMP, LEVEL SENSOR ASSEMBLY GMLAN SERIAL DATA (+) 7 GRN/BRN WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE HIGH SPEED GMLAN SERIAL DATA (+) 7 J110 (2.0L TURBO, 1.5L TURBO) LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LF DR AJAR SW SIG LOGIC LOW REF LOW REF 2 LR DR AJAR SW SIG NETWORK BUS 3 NETWORK BUS 4 OIL LEVEL SWI SIG OIL PRESSURE SENS SIG PRIMARY FUEL LEVEL SENS SIG PRIMARY FUEL LEVEL SENSOR RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RR DR AJAR SW SIG SEC SENS SIG SECONDARY FUEL LEVEL SENSOR SENS 2 LOW REF SENS LOW REF UNDERHOOD FUSE BLOCK WAIT TO START IND CTRL WHT WIRE WHT/RED WIRE YEL/BRN WIRE

5 VOLT REF A/C PRESS AMBIENT LIGHT/SUNLOAD SENSOR (TOP CENTER OF DASH) ANTI-THEFT SYSTEM BATT POS BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/WHT WIRE BRN/RED WIRE CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM COOLING FAN COOLING FAN MOTOR (MOUNTED TO COOLING FAN SHROUD) CTRL RLY SIG DATA (-) (3) ENG COOLANT ENGINE CONTROLS SYSTEM FUSE SPLY 1 GMLAN SERIAL GRN WIRE GRY WIRE HEADLIGHTS SYSTEM LOGIC LOW REF 2 MAIN RLY PPL/BLU WIRE RED/BLU WIRE RED/WHT WIRE SENS LO REF SENS SIG SPD SIG TEMP SENS SIG UNDERHOOD FUSE BLOCK VOLT WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE

2.0L TURBO 1.5L TURBO 1.6L TURBO DIESEL ACCY WAKEUP SER DATA AUTOMATIC TRANSMISSION ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY (6 SPEED A/T) BATT POS VOLT BLK WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY ECM, TCM FUSE ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) GMLAN SER DATA - (1) GRN/YEL WIRE GRY/BRN WIRE HI SPD GMLAN SER DATA (+) 3 HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT IGN SW MODE CTRL BACKUP IMS MODE SW LO CTRL IMS MODE SW LO REF INFOTAINMENT REGULATED CTRL NCA WIRE POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER (LOWER CENTER OF DASH) PPL/GRN WIRE PPL/YEL WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RUN/CRANK IGN 1 VOLT SIG GND STARTER ENABLE RLY CTRL STARTER PINION SOL RLY CTRL TRANS PARK/ NEUTRAL SIG 1 TRANS PARK/NEUTRAL SIG 1 TRANSMISSION CONTROL MODULE TRANSMISSION CONTROL MODULE (9 SPEED A/T) (FRONT OF TRANSMISSION) TRANSMISSION INTERNAL MODE SWITCH UNDERHOOD FUSE BLOCK VAR/ FUNC FUSE WHT WIRE WHT/BLU WIRE WHT/GRY WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/PPL WIRE

A/C COMPRESSOR CLUTCH RELAY CTRL A/C REFRIGERANT PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR (NEAR TOP RIGHT SIDE OF RADIATOR) ACCELERATOR PEDAL POS 5 V REF 1 ACCELERATOR PEDAL POS 5 V REF 2 ACCELERATOR PEDAL POS LOW REF 1 ACCELERATOR PEDAL POS LOW REF 2 ACCELERATOR PEDAL POS SIG 1 ACCELERATOR PEDAL POS SIG 2 ACCELERATOR PEDAL POSITION SENSOR ACCESSORY WAKEUP SERIAL DATA AIR CONDITIONING SYSTEM BATT POS VOLT BLK/BLU WIRE BLK/BRN WIRE BLK/PPL WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLUNT CUT) BRAKE PEDAL POSITION SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRAKE POS SENS LOW REF BRAKE POS SENS SIG BRN/BLK WIRE BRN/BLU WIRE BRN/RED WIRE BRN/WHT WIRE CHECK ENGINE INDICATOR CTRL COMPUTER DATA LINES SYSTEM COOLANT PUMP CTRL COOLING FAN CTRL RLY SPD SIG COOLING FANS SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG DOOR LOCKS, ANTI-THEFT SYSTEMS ECM FUSE ENG CTRL SENS LO REF (2) ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUEL METERING VALVE HIGH CTRL FUEL METERING VALVE LOW CTRL FUEL PRESSURE REGULATOR 1 FUEL PUMP PRIMARY RELAY CTRL GLOW PLUG CTRL GMLAN SERIAL DATA (+) 7 GMLAN SERIAL DATA (-) 3 GMLAN SERIAL DATA - 1 GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/PPL WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE HOOD OPEN SWITCH SIGNAL HOT AT ALL TIMES INDUCTION AIR TEMP SENS SIG INTAKE AIR TEMP SENS LOW REF LOOP AUXILIARY PUMP RLY CTRL MAIN RELAY FUSED SPLY 1 MAIN RELAY FUSED SPLY 2 MAIN RELAY FUSED SPLY 3 MASS AIR FLOW SENS SIG NETWORK SERIAL DATA BUS 21 POWERTRAIN RELAY COIL CTRL PPL/BLU WIRE PPL/GRN WIRE PPL/YEL WIRE RED/WHT WIRE RUN/CRANK IGN 1 VOLT SIG GND STARTER ENABLE RLY CTRL STARTING/CHARGING SYSTEM TRANSMISSION PARK/NEUTRAL SIG 1 TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK WAIT TO START IND CTRL WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

BATT POS VOLT BLK WIRE BLK/PPL WIRE BLU WIRE BLU/BRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM CTRL CTRL 1 DEF HEATER GND DEF HEATER SPLY 1 EXH FUEL HTR FUSE EXHAUST PARTICULATE MATTER SENSOR GRN/BLU WIRE GRN/PPL WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES LEVEL SENS GND LEVEL SENS SIG LEVEL SENS SPLY LINE HEAT GND MODULE WAKE NITROGEN OXIDES SENSOR 2 PPL/BLU WIRE PPL/GRN WIRE PRESS SENS GND PRESS SENS SIG PRESS SENS SPLY PUMP GND PUMP PHASE A PUMP PHASE B PUMP PHASE C REAR BODY FUSE BLOCK RED WIRE RED/PPL WIRE RED/WHT WIRE REDUCTANT CONTROL MODULE REDUCTANT CONTROL MODULE RELAY 1 REDUCTANT QUALITY SENSOR SENS 1 SENS GND SENS SIG SENS SPLY SERIAL DATA SERIAL DATA (-) 7 TANK HEAT GND TANK HEAT SPLY TEMP SENS UP SIG WHT WIRE WHT/BLU WIRE WHT/RED WIRE YEL/WHT WIRE

ACT DIAG SIG BLK WIRE BLK/GRN WIRE BLK/PPL WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BLUNT CUT) BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BYPASS SOL CTRL ENGINE CONTROL MODULE ENGINE OIL LEVEL SWITCH EXHAUST GAS RECIRCULATION COOLER BYPASS SOLENOID VALVE FUEL RAIL CTRL FUEL RAIL SENS SIG GRN WIRE GRN/GRY WIRE GRN/PPL WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/PPL WIRE GRY/RED WIRE INTAKE MANIFOLD RUNNER VALVE ACTUATOR MAF SENS CTRL MAP SENS LOW REF MAP SENS SIG MULTI-FUNCTION INTAKE AIR SENSOR OIL LEVEL SW SIG OIL PUMP SIG PISTON JET VLV CTRL PPL/BLU WIRE PRESS SOL LO REF RED WIRE REDUCTANT LEVEL SENSOR 1 REDUCTANT PRESSURE SENSOR REDUCTANT PUMP REDUCTANT PUMP, SENSOR ASSEMBLY REDUCTANT TANK HEATER REDUCTANT TEMPERATURE SENSOR SOLENOID RLY CTRL STARTING/CHARGING SYSTEM STR PINION THROTTLE CTRL CLOSE THROTTLE CTRL OPEN WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/BLU WIRE YEL/PPL WIRE YEL/WHT WIRE