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

5 VOLT REF A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE AUXILIARY HEATER CTRL BATT POS BATT POS VOLT BATTERY FUSE BLOCK BATTERY POSITIVE VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLOWER MOTOR BLOWER MTR SPD CTRL BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BLWR MTR BRN/GRN WIRE BRN/PPL WIRE COMPUTER DATA LINES SYSTEM DATA BUS 9 DEFOGGER SYSTEM DRIVER INFORMATION CENTER DISPLAY DSP HMI FUSE ELEC VARIABLE DISPLACEMENT CTRL ELEC VARIABLE DISPLACEMENT SPLY ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND FUSE 3 FUSE 4 FUSE 6 GRN WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED HUMIDITY SENS SIG HUMIDITY TEMP SENS SIG HVAC BLWR FUSE HVAC CONTROL MODULE (TOP CENTER OF DASH) HVAC FUSE INSIDE AIR TEMP SENS SIG INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN SERIAL DATA LOWER RIGHT FRONT OF ENGINE) POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER (W/ START/STOP SYSTEM) (LOWER CENTER OF DASH) PPL/GRN WIRE REAR DEFOG RLY CTRL RED WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE REGULATED CTRL RUN/CRANK IGNITION 1 VOLT SOLAR SENS DRV SIG SOLAR SENS LOW REF SPD CTRL TEMP SENS LOW REF UNDERHOOD FUSE BLOCK VAR/FUNC FUSE VIO WIRE VOLT W/ START/STOP SYSTEM W/O START/STOP SYSTEM WINDSCREEN TEMP SENS SIG WINDSHIELD TEMPERATURE, INSIDE MOISTURE SENSOR YEL WIRE YEL/BLU WIRE YEL/RED WIRE

2.0L TURBO, 1.5L TURBO 1.6L ACT CTRL ACTR LOCK CTRL ACTR UNLCK CTRL ACTUATOR BATT POS VOLT BCM 8 FUSE BLK WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRN/GRN WIRE BRN/PPL WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM CTRL DR LOCK CTRL DRIVER DOOR LOCK SWITCH DRIVER INFORMATION CENTER DISPLAY GMLAN SER DATA (-) (2) GMLAN SER DATA - (1) GRY WIRE GRY/GRN WIRE GRY/WHT WIRE HEADLIGHTS SYSTEM HOOD OPEN SW SIG HOOD STATUS B SIG HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LH HDLP LO BEAM CTRL LOCK SIG LOGIC NCA WIRE PASS DOOR LOCK SW LOCK CTRL PASS DOOR LOCK SW UNLOCK CTRL PASSENGER DOOR LOCK SWITCH PPL PPL/GRN WIRE RCV SIG RECEIVE SIG RED/BRN WIRE REMOTE CONTROL DOOR LOCK RECEIVER RH HDLP LO BEAM CTRL SEC IND CTRL SECURITY IND SERIAL DATA (+) (3) TRANS SIG UNDERHOOD FUSE BLOCK UNLCK SIG VAR/ FUNC FUSE WHT WIRE WHT/PPL WIRE YEL WIRE YEL/GRN WIRE YEL/PPL WIRE

2.0L TURBO, 1.5L TURBO 1.6L AMBIENT LIGHT/ SUNLOAD SENSOR BCM 8 FUSE BLK WIRE BLK/GRN WIRE BLU/BLK WIRE BLU/PPL WIRE BLU/WHT WIRE BRN/GRN WIRE BRN/YEL WIRE BUS 3 COMPUTER DATA LINES SYSTEM DRIVER DOOR LATCH ASSEMBLY ENGINE CONTROL MODULE ENGINE HOOD SWITCH GRN WIRE GRN/YEL WIRE GRY WIRE HOOD OPEN SW SIG HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK LF DR AJAR LOGIC DRIVER WINDOW MOTOR MODULE LOGIC DRIVER WINDOW SWITCH LOW REF NCA WIRE NETWORK NETWORK BUS 3 PPL RED/BRN WIRE RED/WHT WIRE SERIAL DATA (+) (3) STATUS SIG SW SIG UNLOCK SIG WHT WIRE WHT/GRN WIRE WHT/PPL WIRE WHT/YEL WIRE YEL WIRE

BLK WIRE BRN/GRN WIRE BRN/YEL WIRE BUS 3 BUS 4 COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY GMLAN SER DATA (-) (2) GRN WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LOGIC LOGIC LOGIC PASSENGER WINDOW SWITCH LOGIC RIGHT REAR WINDOW SWITCH LR DR AJAR NETWORK NETWORK BUS 4 PASS DR AJAR SW SIG PASSENGER DOOR LATCH ASSEMBLY PEPS FUSE PPL PPL/GRN WIRE REAR COMPARTMENT KEYLESS ENTRY ANTENNA REAR FASCIA KEYLESS ENTRY ANTENNA RED/WHT WIRE RIGHT REAR DOOR LATCH ASSEMBLY RR DR AJAR SW SIG SECURITY IND SW SIG UNDERHOOD FUSE BLOCK VAR/ FUNC FUSE WHT/GRN WIRE

"CHECK ENGINE" IND CTRL ABS IND. AFL IND AIR BAG IND BATT POS VOLT BATT POSITIVE VOLT BATTERY FUSE BLOCK BK USB BLK WIRE BRAKE IND BRN/WHT WIRE CHARGING IND COMPUTER DATA LINES SYSTEM CRUISE IND DOOR LOCK IND DOWN DRIVER INFORMATION CENTER DISPLAY ENGINE COOLANT TEMPERATURE GAUGE ENGINE OIL PRESSURE IND FORWARD COLLISION ALERT LED CTRL FRONT FOG LAMP IND FUEL GAUGE FUSE 3 GLOW PLUG IND GRN/BLK WIRE GRN/BRN WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/PPL WIRE GRY/YEL WIRE HEAD-UP DISPLAY SIG HIGH BEAM ASSISTANT IND HIGH BEAM LAMP IND HILL DESCENT CONTROL IND HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY 1 ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK IPC USB FUSE KM/H IND LANE KEEPING ASSIST IND LEFT TURN IND LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 12 LOGIC LOW FUEL IND LOW SPD GMLAN SERIAL DATA LOW TIRE PRESSURE IND LOW WASHER FLUID IND CTRL MALFUNCTION IND MOST CTRL MOST SERIAL DATA (+) MPH IND NAVIGATION SYSTEM PARK BRAKE IND PARK LAMPS IND POWER SUPPLY TRANSFORMER PPL PPL/GRN WIRE REAR FOG LAMP IND RED/BRN WIRE RED/GRY WIRE REFLECTED LED DISPLAY DIMMING CTRL REGULATED CTRL RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH RIGHT TURN IND SEAT BELT IND SECURITY IND SEEK DOWN SEEK UP SERVICE PARK BRAKE IND SPEEDOMETER TACHOMETER TRACTION OFF IND UNDERHOOD FUSE BLOCK UP LEFT USB USB DRIVE DATA CONNECTOR VAR/ FUNC FUSE VEHICLE AHEAD IND VOL - VOL + SEL VSC IND VSC OFF IND W/ START/STOP SYSTEM W/O START/STOP SYSTEM WAIT TO START INDICATOR CONTROL WHT WIRE WHT/GRN WIRE WHT/PPL WIRE WIPER/ WASHER SYSTEM

ABS FUSE 22 BATT POSITIVE VOLT BATTERY POSITIVE VOLT BCM 4 FUSE BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/PPL WIRE BODY CONTROL MODULE BRAKE FLUID LEVEL SENS SIG BRN WIRE BRN/PPL WIRE BRN/WHT WIRE BUS 2 COIL CTRL COMPUTER DATA LINES SYSTEM DRIVE MODE SELECT SWITCH DRIVER MODE 1 IND CTRL DRIVER MODE 2 IND CTRL DRIVER MODE 4 IND CTRL DRIVER MODE 5 IND CTRL ELECTRONIC BRAKE CONTROL MODULE (LEFT REAR OF ENGINE COMPT) GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/PPL WIRE GRY/RED WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HUMAN MACHINE INTERFACE CONTROL MODULE BYPASS MODULE IND DIMMING CTRL INSTRUMENT PANEL FUSE BLOCK LO SPD GMLAN SERIAL DATA (-) 1 LOGIC MODE MODE 1 IND MODE 2 IND MODE 4 IND MODE 5 IND NETWORK NETWORK BUS 3 PARK BRAKE APPLY SW SIG PARK BRAKE APPLY SW VOLT REF PARK BRAKE REL SW SIG PARK BRAKE REL SW VOLT REF PARK BRAKE SW SIG PARK BRAKE SW SPLY VOLT PARK BRAKE SWITCH (LOWER LEFT SIDE OF DASH) PASS DR AJAR SW SIG PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW SWITCH PPL/YEL WIRE PRESS BRAKE RAP RLY RAP RLY COIL CTRL RED/BLU WIRE RED/PPL WIRE TOW/ HAUL TRANSMISSION SHIFT LEVER POSITION INDICATOR UNDERHOOD FUSE BLOCK WHT WIRE WHT/GRN WIRE YEL WIRE YEL/BLU WIRE YEL/RED WIRE

A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE BATT POS BATT POS VOLT BATTERY FUSE BLOCK BATTERY POSITIVE VOLT BLK WIRE BLK/GRN WIRE BLOWER MOTOR BLOWER MTR SPD CTRL BLU/BRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BLWR MTR BRN/GRN WIRE BRN/PPL WIRE COMPUTER DATA LINES SYSTEM DATA BUS 9 DEFOGGER SYSTEM DRIVER INFORMATION CENTER DISPLAY DSP HMI FUSE ELEC VARIABLE DISPLACEMENT CTRL ELEC VARIABLE DISPLACEMENT SPLY ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND FUSE 3 GRN WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC BLWR FUSE HVAC CONTROL MODULE (TOP CENTER OF DASH) HVAC FUSE INSIDE AIR TEMP SENS SIG INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN SERIAL DATA LOWER RIGHT FRONT OF ENGINE) POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER (W/ START/STOP SYSTEM) (LOWER CENTER OF DASH) PPL/GRN WIRE REAR DEFOG RLY CTRL RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE REGULATED CTRL RUN/CRANK IGNITION 1 VOLT SOLAR SENS DRV SIG SOLAR SENS LOW REF SPD CTRL UNDERHOOD FUSE BLOCK VAR/FUNC FUSE VOLT W/ START/STOP SYSTEM W/O START/STOP SYSTEM

2.0L TURBO, 1.5L TURBO 1.6L BATT POSITIVE VOLT BCM 1 FUSE BLK WIRE BLU WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DATA BUS 11 DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE GMLAN SER DATA (-) (2) GMLAN SER DATA - (1) GRN/GRY WIRE GRN/PPL WIRE GRY/BLK WIRE GRY/GRN WIRE HOOD OPEN HOOD STATUS B SIG HOT AT ALL TIMES IMMOBILIZER CONTROL MODULE (UNDER CENTER CONSOLE) IMMOBILIZER CTRL IMMOBILIZER LOW REF INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LOCAL INTERCONNECT LOCAL INTERCONNECT NETWORK SER DATA BUS 11 LOGIC NCA WIRE NETWORK SER RED/GRY WIRE SW SIG WHT WIRE YEL WIRE

B+ MIRROR MOTOR FOLD OUT CTRL BLK WIRE BLU WIRE BRN WIRE DEFOGGER SYSTEM DOWN DRIVER OUTSIDE REAR VIEW MIRROR FOLDING MOTOR DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR VIEW MIRROR MOTOR DRIVER OUTSIDE REAR- VIEW MIRROR DRIVER PASSENGER DRIVER SIDE OBJECT DETECTION INDICATOR DRIVER WINDOW SWITCH ELECTROCHROMIC MIRROR CIRCUIT EXTERIOR LIGHTS, DEFOGGER SYSTEMS FOLD IN CTRL FOLDING SWITCH GRN WIRE GRN/BLK WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT LEFT TURN SIGNAL REPEATER LAMP LOGIC MIRROR DIMMING MIRROR MOTOR NAVIGATION SYSTEM OFF OSRVM FUSE PASSENGER POWER DISTRIBUTION SYSTEM PPL PPL/YEL WIRE RED WIRE RED/BRN WIRE RIGHT WHT WIRE WHT/BRN WIRE YEL WIRE YEL/PPL WIRE

ABS FUSE 22 BATTERY POSITIVE VOLT BATTERY POSITIVE VOLTAGE BCM 4 FUSE BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BLK WIRE BLU/PPL WIRE BLU/YEL WIRE BODY CONTROL MODULE (BELOW CENTER OF DASH) BRAKE FLUID LEVEL SENS SIG BRAKE FLUID LEVEL SWITCH BRAKE IND BRN WIRE COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM DOOR AJAR IND DRIVER DOOR LATCH ASSEMBLY DRIVER INFORMATION CENTER DISPLAY DRIVER SEAT BELT SWITCH DRIVER SEAT BELT BUCKLE DRIVER WINDOW MOTOR MODULE DRV SEAT BELT DRV SEAT BELT SW SIG ELECTRONIC BRAKE CONTROL MODULE (LEFT REAR OF ENGINE COMPT) GRN/BRN WIRE GRN/GRY WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/RED WIRE HDLP SW OFF SIG CTRL HDLP SW ON SIG CTRL HEAD HEADLAMP SWITCH HI SPD GMLAN SERIAL DATA (-) (1) HI SPEED GMLAN HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LF DR AJAR SW SIG LO SPD GMLAN SERIAL DATA (-) 1 LO SPD GMLAN SERIAL DATA 2 LOGIC LR DR AJAR SW SIG NCA WIRE NETWORK BUS 3 NETWORK BUS 4 OFF AUTO ORG/BRN WIRE PARK PARK BRAKE APPLY SW SIG PARK BRAKE APPLY SW VOLT REF PARK BRAKE REL SW SIG PARK BRAKE REL SW VOLT REF PARK BRAKE SW SIG PARK BRAKE SW SPLY VOLT PARK BRAKE SWITCH (LOWER LEFT SIDE OF DASH) PASS DR AJAR SW SIG PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW SWITCH RADIO RED/BLU WIRE RED/PPL WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RR DR AJAR SW SIG SEAT BELT IND SERIAL DATA SERIAL DATA 2 SW LOW REF TIRE PRESSURE IND UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLU WIRE WHT/PPL WIRE YEL WIRE YEL/RED WIRE