GMC Terrain II (2017-2021) (left center of lower grill) Wiring diagrams

A/C EVAPORATOR TEMPERATURE SENSOR AIR INLET DR STEPPER MOTOR CTRL 1 AIR INLET DR STEPPER MOTOR CTRL 2 AIR INLET DR STEPPER MOTOR CTRL 3 AIR INLET DR STEPPER MOTOR CTRL 4 AIR RECIRCULATION DOOR ACTUATOR AIR TEMP DR STEPPER MOTOR PASS CTRL 1 AIR TEMP DR STEPPER MOTOR PASS CTRL 2 AIR TEMP DR STEPPER MOTOR PASS CTRL 3 AIR TEMP DR STEPPER MOTOR PASS CTRL 4 AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRY WIRE BLU/WHT WIRE BRN/GRN WIRE DR CTRL LOW REF ECM FUSE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR EVAP CORE TEMP SENS SIG GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BRN WIRE GRY/RED WIRE GRY/WHT WIRE HOT AT ALL TIMES HVAC CONTROL MODULE (TOP CENTER OF DASH) HVAC MOTOR CTRL J121 (1.5L TURBO, 2.0L TURBO) LEFT AIR TEMPERATURE DOOR ACTUATOR MODE DOOR ACTUATOR MODE DR STEPPER MOTOR CTRL 1 MODE DR STEPPER MOTOR CTRL 2 MODE DR STEPPER MOTOR CTRL 3 MODE DR STEPPER MOTOR CTRL 4 ORG/ WIRE PPL/BLU WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE RIGHT AIR TEMPERATURE DOOR ACTUATOR TEMP DR STEPPER MOTOR CTRL 1 TEMP DR STEPPER MOTOR CTRL 2 TEMP DR STEPPER MOTOR CTRL 3 TEMP DR STEPPER MOTOR CTRL 4 UNDERHOOD FUSE BLOCK WHT WIRE WHT/PNK WIRE WHT/RED WIRE YEL WIRE YEL/GRN 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

"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

A/C EVAPORATOR TEMPERATURE SENSOR AIR INLET DR STEPPER MOTOR CTRL 1 AIR INLET DR STEPPER MOTOR CTRL 2 AIR INLET DR STEPPER MOTOR CTRL 3 AIR INLET DR STEPPER MOTOR CTRL 4 AIR RECIRCULATION DOOR ACTUATOR AIR TEMPERATURE DOOR ACTUATOR AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRY WIRE BLU/WHT WIRE BRN/GRN WIRE DR CTRL LOW REF ECM FUSE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR EVAP CORE TEMP SENS SIG GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BRN WIRE GRY/RED WIRE HOT AT ALL TIMES HVAC CONTROL MODULE (TOP CENTER OF DASH) HVAC MOTOR CTRL MODE DOOR ACTUATOR MODE DR STEPPER MOTOR CTRL 1 MODE DR STEPPER MOTOR CTRL 2 MODE DR STEPPER MOTOR CTRL 3 MODE DR STEPPER MOTOR CTRL 4 ORG/ WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE TEMP DR STEPPER MOTOR CTRL 1 TEMP DR STEPPER MOTOR CTRL 2 TEMP DR STEPPER MOTOR CTRL 3 TEMP DR STEPPER MOTOR CTRL 4 UNDERHOOD FUSE BLOCK WHT/PNK WIRE WHT/RED WIRE YEL WIRE

"CHECK ENGINE" IND CTRL 5 VOLT REF A/C COMPRESSOR A/C PRESS SENS SIG AFTER BOIL HTR RLY CTRL AIR CONDITIONING SYSTEM AIR TEMP SENS SIG AMBIENT AIR TEMPERATURE SENSOR APP POS SIG 1 APP SIG (2) BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/PPL WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRY WIRE BRAKE PEDAL POSITION SENSOR BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FAN SPD SIG COOLING FANS SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC SIG DOOR LOCKS, ANTI-THEFT SYSTEMS DRIVE MODE SELECT SWITCH (ON FLOOR CONSOLE) DRV MODE SW SIG ECM FUSE ECM, TCM FUSE ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUEL PUMP PRIMARY RLY CTRL SOL CTRL GMLAN SERIAL DATA (+) 7 GMLAN SERIAL DATA (-) 3 GMLAN SERIAL DATA - 1 GRN WIRE GRN/WHT WIRE GRY WIRE GRY/RED WIRE HIGH REF BANK 1 HOOD OPEN SW SIG HOT ALL ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HUMIDITY SENS SIG IGNITION 1 VOLT LOW REF LOW REF (1) LOW REF 2 MAF SENS SIG MAIN RELAY FUSED SPLY 1 MAIN RELAY FUSED SPLY 2 MODE PARK/NEUTRAL SIG (1) POWERTRAIN MAIN RLY PPL/BLU WIRE PPL/GRN WIRE PPL/YEL WIRE RED/WHT WIRE RELAY COIL CTRL SENS SIG STARTER ENABLE RELAY STARTER ENABLE RLY CTRL STARTING/CHARGING SYSTEM TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK WAKEUP SERIAL DATA WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/PPL WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/PPL WIRE YEL/WHT WIRE

A/C COMPRESSOR CLUTCH RELAY AMBIENT AIR TEMPERATURE SENSOR BATTERY FUSE BLOCK BLK WIRE BLK/GRN WIRE BLK/PPL WIRE BLU/GRN WIRE BLU/GRY WIRE BRN WIRE BRN/BLU WIRE BRN/WHT WIRE DRIVE MODE SELECT SWITCH DRIVE MODE SELECT SWITCH (ON FLOOR CONSOLE) ECM FUSE ECM/TCM FUSE ENGINE CONTROLS IGNITION RELAY FLEX FUEL FUSE FUSE 5 FUSE 6 GRN/BRN WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN/ COIL/ EVEN FUSE IGN/ COIL/ ODD FUSE MODE NON/ WALK FUSE POWER DISTRIBUTION SYSTEM PPL/BLU WIRE PPL/GRN WIRE RED WIRE REDUCTANT INJECTOR TO FUEL HEATER RELAY (DIAGRAM 5 OF 9) TO REDUCTANT CONTROL MODULE RELAY 2 (DIAGRAM 5 OF 9) UNDERHOOD FUSE BLOCK WHT/BLU WIRE WHT/PPL WIRE YEL WIRE

A/C COMPRESSOR CLUTCH RELAY AMBIENT AIR TEMPERATURE SENSOR AUXILIARY COOLANT PUMP RELAY BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLK/GRN WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/PPL WIRE BLU/WHT WIRE BRAKE BOOSTER VACUUM SENSOR BRN/GRY WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DATA (-) (3) DATA OUT SIG ECM FUSE ECM, TCM FUSE ENGINE CONTROLS IGNITION RELAY FLEX FUEL FUSE FUEL LEVEL SENSOR FUEL PUMP FUEL PUMP CTRL FUEL PUMP DRIVER CONTROL MODULE (UNDER LEFT SIDE OF VEHICLE) FUEL PUMP FUSE FUEL PUMP, LEVEL SENSOR ASSEMBLY (INSIDE FUEL TANK) FUSE 6 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 VOLT IGN/ COIL/ ODD FUSE IGN/COIL/ EVEN FUSE LOW REF PPL/BLU WIRE PPL/GRN WIRE PPL/YEL WIRE PRIMARY FUEL LEVEL SENSOR RED WIRE RED/BLU WIRE REF SECONDARY FUEL LEVEL SENSOR SENS LOW SERIAL DATA UNDERHOOD FUSE BLOCK VAR/ FUNC FUSE WHT WIRE WHT/BLU WIRE WHT/PPL WIRE YEL WIRE