GMC Terrain 2018 Fuse Box Info
Passenger compartment fuse box location:
The instrument panel fuse box is under the instrument panel on the driver side.
Engine compartment fuse box location:
Luggage compartment fuse box location:
The rear compartment fuse box is behind a trim panel on the side of the rear compartment.
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Functions |
| 01 | DC AC inverter |
| 02 | Front windows |
| 03 | Trailer brake |
| 04 | Heating, ventilation, and air conditioning blower |
| 05 | Body control module 2 |
| 06 | CGM |
| 07 | - |
| 08 | Body control module 3 |
| 09 | Amplifier |
| 10 | - |
| 11 | - |
| 12 | - |
| 13 | - |
| 14 | Electronic shifter |
| 15 | Transmission control module |
| 16 | Front heated seats |
| 17 | Left data link connector |
| 18 | Body control module 7 |
| 19 | Exterior mirror |
| 20 | Body control module 1 |
| 21 | Body control module 4 |
| 22 | Body control module 6 |
| 23 | Electric steering column lock |
| 24 | Sensing and diagnostic module |
| 25 | Occupancy sensor |
| 26 | - |
| 27 | Power seats |
| 28 | Rear windows |
| 29 | - |
| 30 | Front heated seats switch |
| 31 | Steering wheel controls |
| 32 | Body control module 8 |
| 33 | Heating, ventilation, and air conditioning |
| 34 | Passive entry, passive start |
| 35 | Liftgate latch |
| 36 | Shift charger |
| 37 | Cigarette lighter |
| 38 | OnStar |
| 39 | Instrument panel USB |
| 40 | Camera module/ Liftgate module |
| 41 | Parking assist module |
| 42 | Radio |
| K01 | Deadbolt |
| K02 | Retained accessory power |
| K03 | Liftgate |
| K04 | - |
| K05 | Logistics |
| CB1 | Front auxiliary power outlet |
| CB2 | Auxiliary power outlet console |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| 01 | Starter 1 |
| 02 | Starter 2 |
| 03 | Lambda sensor 1 |
| 04 | Engine control module |
| 05 | FlexFuel sensor |
| 06 | Transmission control module |
| 07 | - |
| 08 | Engine control module |
| 09 | Air conditioning clutch |
| 10 | Canister vent |
| 11 | Fuel system |
| 12 | Front heated seats |
| 13 | Afterboil pump |
| 14 | - |
| 15 | Lambda sensor 2 |
| 16 | Fuel injectors – odd |
| 17 | Fuel injectors – even |
| 18 | –/Selective catalytic reduction module (diesel only) |
| 19 | –/NOx soot sensor (diesel only) |
| 20 | DC DC converter 2 |
| 21 | Shift control |
| 22 | Antilock brake pump |
| 23 | Front washer |
| 24 | - |
| 25 | –/Diesel fuel heater (diesel only) |
| 26 | - |
| 27 | Antilock brake VAL |
| 28 | LD trailer |
| 29 | Rear window defogger |
| 30 | Mirror defroster |
| 31 | - |
| 32 | Variable functions |
| 33 | - |
| 34 | Horn |
| 35 | Vacuum pump |
| 36 | Right high-beam headlamp |
| 37 | Left high-beam headlamp |
| 38 | Automatic headlamp leveling |
| 39 | Fog lamps |
| 40 | - |
| 41 | Transmission range control module |
| 42 | Motorized headlamp |
| 43 | Fuel pump |
| 44 | Interior rearview mirror |
| 45 | Canister vent solenoid |
| 46 | Driver side Ventilated Seat |
| 47 | Steering column lock assembly |
| 48 | Rear wiper |
| 49 | - |
| 50 | Heated steering wheel |
| 51 | Right headlamp |
| 52 | Engine control module/ Transmission control |
| 53 | - |
| 54 | Front wiper |
| 55 | Front wiper speed/ Control |
| 56 | - |
| 57 | Left headlamp |
| K01 | Starter solenoid |
| K02 | Air conditioning control |
| K03 | - |
| K04 | Wiper control |
| K05 | Starter Solenoid |
| K06 | –/Fuel heater (diesel only) |
| K07 | - |
| K08 | - |
| K09 | Wiper speed |
| K10 | - |
| K11 | - |
| K12 | High-beam headlamps |
| K13 | Headlamps/Daytime running lamps |
| K14 | Run/Crank |
| K15 | Rear window defogger |
| K16* | Horn |
| K17* | Selective catalytic reduction |
| K18* | Fog lamps |
| K19* | Coolant pump |
| K20* | - |
| K21* | Rear washer |
| K22* | Front washer |
| K23* | Wiper control |
| * | PCB relays are not serviceable |
Luggage compartment fuse box:
| Fuse/Relay N° | Functions |
| 1 | Exhaust fuel heater |
| 2 | Liftgate |
| 3 | Trailer auxiliary power |
| 4 | Power seats |
| 5 | Memory seat module |
| 6 | Sunroof |
| 7 | Side blind zone alert |
| 8 | Trailer reverse lamps |
| 9 | Rear heated seat 1 |
| 10 | Parking assist |
| 11 | Rear heated seat 2 |
| 12 | - |
| 13 | Trailer parking lamp |
| 14 | Right trailer turn signal lamp |
| 15 | Left parking lamp |
| 16 | Right parking lamp |
| 17 | - |
| 18 | Left trailer turn signal lamp |
| 19 | All-wheel drive |
| 20 | Lumbar |
| 21 | Rear auxiliary power outlet |
| 22 | Rear drive unit |
| K1 | Right trailer stoplamp/Turn signal lamp |
| K2 | Trailer reverse lamps |
| K3 | Left trailer stoplamp/Turn signal lamp |
| K4 | Park lamps |
| K5 | Selective catalytic reduction (SCR) – (diesel only) |
