GMC Terrain (2018-2020…) fuses and relays


In this article, we consider the second-generation GMC Terrain, available from 2018 to the present. Here you will find fuse box diagrams of GMC Terrain 2018, 2019 and 2020, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

See other GMC Terrain:

Fuse Layout GMC Terrain 2018-2020…


Cigar lighter (power outlet) fuses in the GMC Terrain are the fuse #37 (Cigarette lighter), circuit breakers CB1 (2018: Front auxiliary power outlet), CB2 (Auxiliary power outlet console) in the Instrument panel fuse box, and fuse #F21 (Rear auxiliary power outlet) in the Rear Compartment Fuse Block.

Fuse box location

Instrument panel

The instrument panel fuse block is under the instrument panel on the driver side.The location of the fuses in the passenger compartment: GMC Terrain (2018, 2019-...)

To access, press and release the latch near the top center square.

Engine compartment

The engine compartment fuse box is located on the driver side of the engine compartment.The location of the fuses in the engine compartment: GMC Terrain (2018, 2019-...)

Rear Compartment

The rear compartment fuse block is behind a trim panel on the side of the rear compartment.The location of the fuses in the trunk: GMC Terrain (2018, 2019-...)

Remove the trim plate to access the fuse block.

Fuse box diagrams

2018, 2019, 2020

Engine compartment

Under-hood fuse box diagram: GMC Terrain (2018, 2019, 2020)


Assignment of the fuses in the engine compartment (2018, 2019, 2020)

F01 Starter 1
F02 Starter 2
F03 Lambda sensor 1
F04 Engine control module
F05 FlexFuel sensor
F06 Transmission control module
F08 Engine control module
F09 Air conditioning clutch
F10 Canister vent solenoid
F11 Fuel system
F12 Front heated seats
F13 Afterboil pump
F15 Lambda sensor 2
F16 2018: Fuel injectors-odd
2019: Ignition coils
F17 2018: Fuel injectors – even.
2019-2020: Engine control module
F18 –/Selective catalytic reduction module (diesel only)
F19 –/NOx soot sensor (diesel only)
F20 DC DC converter 2
F21 Shift control
F22 Antilock brake pump
F23 2018: Front washer.
2019-2020: Front/Rear washer pump
F25 -/Diesel fuel heater (diesel only)
F27 Antilock brake valves
F28 LD trailer
F29 Rear window defogger
F30 Mirror defroster
F32 Variable functions
F34 Horn
F35 2018: Vacuum pump.
2019-2020: Not Used
F36 Right high-beam headlamp
F37 Left high-beam headlamp
F38 Automatic headlamp leveling
F39 Fog lamps
F41 Transmission range control module
F42 Motorized headlamp
F43 2018: Fuel pump.
2019-2020: Not Used
F44 Interior rearview mirror
F45 2018: Canister vent solenoid.
2019-2020: Passenger side ventilated seat
F46 Driver side Ventilated Seat
F47 Steering column lock assembly
F48 Rear wiper
F50 Heated steering wheel
F51 2018: Right headlamp.
2019-2020: Right daytime running lamp
F52 Engine control module/ Transmission control
F54 2018: Front wiper.
2019-2020: Not Used
F55 Front wiper speed/ Control
F57 2018: Left headlamp.
2019-2020: Left daytime running lamp
K01 Starter solenoid
K02 Air conditioning control
K03 2018: Not Used
2019: Engine control module
K04 Wiper control
K05 Starter Solenoid / Starter pinion
K06 -/Fuel heater (diesel only)
K09 Wiper speed
K12 High-beam headlamps
K13 Headlamps/Daytime running lamps
K14 Run/Crank
K15 Rear window defogger
*K16 Horn
*K17 Selective catalytic reduction (diesel only)
*K18 Fog lamps
*K19 Coolant pump
*K21 Rear washer
*K22 Front washer
*K23 Wiper control
* PCB relays are not serviceable.

Instrument panel

Instrument panel fuse box diagram: GMC Terrain (2018, 2019, 2020)

Assignment of the fuses in the Instrument panel (2018, 2019, 2020)

F01 DC AC inverter
F02 Front windows
F03 Trailer brake
F04 Heating, ventilation, and air conditioning blower
F05 Body control module 2
F08 Body control module 3
F09 Amplifier
F14 Electronic shifter
F15 Transmission control module
F16 Front heated seats
F17 Left data link connector
F18 Body control module 7
F19 Exterior mirror
F20 Body control module 1
F21 Body control module 4
F22 Body control module 6
F23 Electric steering column lock
F24 Sensing and diagnostic module
F25 Occupancy sensor
F27 Power seats
F28 Rear windows
F30 Front heated seats switch
F31 Steering wheel controls
F32 Body control module 8
F33 Heating, ventilation, and air conditioning
F34 Passive entry, passive start
F35 Liftgate latch
F36 2018: Shift charger.
2019-2020: Wireless charger module/USB accessory
F37 Cigarette lighter
F38 OnStar
F39 Instrument panel USB
F40 Camera module/ Liftgate module
F41 Parking assist module
F42 Radio
K01 2018-2019: Deadbolt.
2020: Not Used
K02 Retained accessory power
K03 Liftgate
K05 Logistics
Circuit Breakers
CB1 2018: Front auxiliary power outlet.
2019-2020: Not Used
CB2 Auxiliary power outlet console

Rear Compartment

Trunk fuse box diagram: GMC Terrain (2018, 2019, 2020)

Assignment of the fuses in the Rear Compartment (2018, 2019, 2020)

F1 2018-2019: Exhaust fuel heater.
2020: Exhaust fuel heater/Selective catalytic reduction power module (diesel only)
F2 Liftgate
F3 Trailer auxiliary power
F4 2018: Power seats.
2019: Passenger Power Seat
F5 Memory seat module
F6 Sunroof
F7 Side blind zone alert
F8 Trailer reverse lamps
F9 Rear heated seat 1
F10 Parking assist
F11 Rear heated seat 2
F13 Trailer parking lamp
F14 Right trailer turn signal lamp
F15 Left parking lamp
F16 Right parking lamp
F17 2018-2019: Not Used.
2020: Video processing module
F18 Left trailer turn signal lamp
F19 All-wheel drive
F20 Lumbar
F21 Rear auxiliary power outlet
F22 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 2018-2019: Selective catalytic reduction (SCR) (diesel only).
2020: Exhaust fuel heater/Selective catalytic reduction power module (diesel only)

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