GMC Terrain II facelift (2021-2024) blu/blk Wiring diagrams

BATTERY POSITIVE VOLTAGE BLK WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE DATA LINK CONNECTOR (BELOW STEERING COLUMN) GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE HANDS-FREE LIFTGATE SENSOR CONTROL MODULE HI SPD GMLAN SER DATA (+) 5 HI SPD GMLAN SER DATA (-) 2 HIGH SPEED GMLAN SERIAL DATA (+) 8 HIGH SPEED GMLAN SERIAL DATA (+) 9 HIGH SPEED GMLAN SERIAL DATA (-) 11 HIGH SPEED GMLAN SERIAL DATA (-) 12 HIGH SPEED GMLAN SERIAL DATA (-) 13 HIGH SPEED GMLAN SERIAL DATA (-) 8 GROUND HOT AT ALL TIMES HVAC CONTROL HVAC CONTROL MODULE HVAC CONTROLS INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT PANEL FUSE BLOCK LEFT SIDE OBJECT SENSOR MODULE LIN BUS 1 LO SPD GMLAN LO SPD GMLAN SER DATA LOW SPEED GMLAN SERIAL DATA LOW SPEED GMLAN SERIAL DATA 2 LOW SPEED GMLAN SERIAL DATA 3 MODULE LIN BUS 2 NCA WIRE RED/GRN WIRE RED/VIO WIRE RIGHT SIDE OBJECT SENSOR MODULE SER DATA SER DATA COMM ENABLE SERIAL DATA GATEWAY MODULE (CENTER OF DASH) WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WINDSHIELD TEMPERATURE, INSIDE MOISTURE SENSOR

6 SPEED A/T ACCY WAKEUP SER DATA BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE EXCEPT CALIFORNIA GRN WIRE GRN/VIO WIRE GRY/GRN WIRE HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (+) 3 HI SPD GMLAN SER DATA (-) 7 LIN BUS 1 VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

ACCY WAKEUP SER DATA BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLU WIRE ETHERNET BUS 7 (-) FUEL PUMP DRIVER CONTROL MODULE GRN WIRE GRN/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE HI SPD GMLAN SER DATA (+) 3 HI SPD GMLAN SER DATA (-) 7 INSTRUMENT CLUSTER LIN BUS 1 LO SPD GMLAN SER DATA 2 RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL TRANSMISSION RANGE SELECTOR CONTROLS VIDEO PROCESSING CONTROL MODULE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

AMBIENT AIR TEMP SENS SIGNAL AMBIENT AIR TEMPERATURE SENSOR AUXILIARY COOLANT PUMP RELAY AUXILIARY HEATER COOLANT PUMP BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE COMPUTER DATA LINES SYSTEM COOLING FAN MOTOR (MOUNTED TO COOLING FAN SHROUD) ENG COOLANT TEMP SENS SIG ENGINE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR GMLAN SERIAL DATA (-) 3 GRN/VIO WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED LOGIC LOW REF 2 NCA WIRE RED/BLU WIRE RED/WHT WIRE SENS LO REF TURBOCHARGER COOLANT PUMP RELAY CONTROL UNDERHOOD FUSE BLOCK VIO/BLU WIRE WHT WIRE YEL/BLU WIRE

BATT POS VOLT BLK WIRE BLU/BLK WIRE BLU/VIO WIRE BLU/YEL WIRE BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DATA 2 (+) ELECTRONIC BRAKE CONTROL MODULE FRONT FOG LAMP IND GMLAN SERIAL GROUND GRY/GRN WIRE GRY/RED WIRE HIGH BEAM IND HIGH SPEED GMLAN SERIAL DATA (-) (2) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER LEFT FRONT FOG LAMP LO SPD LOGIC PARK BRAKE APPLY SW SIG PARK BRAKE APPLY SW VOL REF PARK BRAKE RELEASE SW SIG PARK BRAKE RELEASE SW VOL REF PARK BRAKE SW SIG PARK BRAKE SW SPLY VOL PARK BRAKE SWITCH PARK LIGHTS IND RED/VIO WIRE RED/WHT WIRE RIGHT FRONT FOG LAMP UNDERHOOD FUSE BLOCK VIO/GRN WIRE WHT WIRE YEL WIRE YEL/RED WIRE

BACKLIGHT LOW REF BACKLIGHT LOW REF DIMMING CTRL BACKUP LAMP CTRL BATT POS VOLT BATTERY FUSE BLOCK BK LVDS INFOTAINMENT DISPLAY SIG BLK WIRE BLK/GRN WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/RED WIRE BRN/BLU WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRANKSHAFT POS SENS REPLICATED SIG GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY 1 ENERGIZED INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LOW SPD GMLAN SERIAL DATA 2 LR SPEAKER (+) CTRL LR SPEAKER SIG (-) LVDS NAVIGATION DISPLAY DIMMING CTRL POWER SUPPLY TRANSFORMER RADIO RADIO KEYPAD BUTTON SIG RADIO VOLUME UP SIG RADIO KEYPAD DIMMING CTRL RADIO KEYPAD POWER SIG RADIO KEYPAD VOLT REF RADIO VOLUME DOWN SIG RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/YEL WIRE REGULATED CTRL RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) 1 RIGHT FRONT DOOR SPEAKER RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RR SPEAKER (+) CTRL RR SPEAKER SIG (-) TOUCH INTERRUPT REQ SIG VIO/BLU WIRE VIO/WHT WIRE W/ START/ STOP SYSTEM W/O START STOP SYSTEM WHT WIRE YEL WIRE YEL/BLK WIRE

BATT POS BG COAX WIFI ANTENNA COAX SIG BK COAX AM/FM BK USB USB SERIAL DATA BLK WIRE BLK/BRN WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE CAMERA SIGNAL 2 CAMERA SIGNAL 2 (-) MICROPHONE 4 LOW REF COAX DATA ETHERNET BUS 4 (-) GRN/BLK WIRE GRN/BRN WIRE GROUND GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/WHT WIRE GRY/YEL WIRE HD/XM COAX CU LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LEFT REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LOGIC MIC (-) LOW REF MIC SIG MICROPHONE 1 FEEDBACK SIG MICROPHONE 1 SIG MICROPHONE 2 FEEDBACK SIG MICROPHONE 2 SIG MICROPHONE 3 FEEDBACK SIG MICROPHONE 3 SIG MICROPHONE 4 SIG NAVIGATION SYSTEM (REAR VIEW CAMERA CIRCUIT) RADIO RED WIRE RED/BRN WIRE RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RIGHT REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE USB USB SERIAL VIO/BLU WIRE VOLT W/O S-BAND DIGITAL AUDIO SYSTEM WHT/BLU WIRE WHT/GRN WIRE WLAN WIRELESS COMMUNICATION ANTENNA YEL WIRE

AUDIO LOW REF AUDIO SIG + BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLK/GRY WIRE BLU/BLK WIRE BLU/GRN WIRE COMPUTER DATA LINES SYSTEM GRN/WHT WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY 1 ENERGIZED INSTRUMENT PANEL FUSE BLOCK LOW SPD GMLAN SERIAL DATA 2 MIC (-) LOW REF MIC SIG POWER SUPPLY TRANSFORMER RADIO RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE REF REGULATED CTRL RIGHT FRONT MOBILE TELEPHONE MICROPHONE SERIAL DATA (-) 9 SERIAL DATA (-) 9 BACKUP LAMP CTRL SERIAL DATA (-) 9 SERIAL DATA (+) 9 SERIAL DATA COMM ENABLE SIG VIO/YEL WIRE W/ ONSTAR W/ START/ STOP SYSTEM W/O ONSTAR W/O START STOP SYSTEM WHT/BLU WIRE WHT/GRN WIRE

AUDIO AMPLIFIER (CENTER OF DASH) BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE CENTER INSTRUMENT PANEL SPEAKER COAX COMPUTER DATA ENGINE CONTROL MODULE ETHERNET BUS 6 (-) FRONT CENTER SPEAKER (+) GRN WIRE GRN/BLK WIRE GRN/BRN WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/WHT WIRE LEFT FRONT DOOR SPEAKER LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LEFT REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LF TWEETER SPEAKER (+) LINES SYSTEM LOW SPEED GMLAN LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MICROPHONE 1 FEEDBACK SIG MICROPHONE 1 SIG MICROPHONE 2 FEEDBACK SIG MICROPHONE 2 SIG MICROPHONE 3 FEEDBACK SIG MICROPHONE 3 SIG MICROPHONE 4 LOW REF MICROPHONE 4 SIG RED WIRE RED/BLU WIRE RED/BRN WIRE RED/VIO WIRE REPLICATED SIG RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) 1 RF TWEETER SPEAKER (+) RIGHT FRONT DOOR SPEAKER RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RR SPEAKER (+) CTRL RR SPEAKER SIG (-) SERIAL DATA 2 VIO/BLU WIRE VIO/BRN WIRE WHT WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/WHT WIRE

ACTIVE NOISE CANCELLATION MODULE BATT POS VOLT BLK WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BRN/BLU WIRE COMPUTER DATA LINES SYSTEM ENGINE CONTROL MODULE GRN WIRE GRN/BLK WIRE GRN/BRN WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/YEL WIRE LEFT FRONT DOOR SPEAKER LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LEFT REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LOW SPEED GMLAN LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 LOW REF MICROPHONE 3 SIG MICROPHONE 4 LOW RTN MICROPHONE 4 SIG RED WIRE RED/BLU WIRE RED/BRN WIRE RED/VIO WIRE REMOTE ENABLE SIG REPLICATED SIG RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) 1 RIGHT FRONT DOOR SPEAKER RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RR SPEAKER (+) CTRL RR SPEAKER SIG (-) SERIAL DATA 2 VIO/BLU WIRE WHT WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE