Looking for GMC Terrain fuse box diagrams without the guesswork? This article focuses on the second-generation GMC Terrain, available from 2018 , and includes diagrams for GMC Terrain 2018, 2019, 2020, 2021, 2022, 2023, and 2024 , along with the exact fuse panel locations inside the vehicle and a clear explanation of fuse and relay assignments (fuse layout) to help you track down electrical issues faster than flipping through a manual.
The instrument panel fuse block is under the instrument panel on the driver side.
To access, press and release the latch near the top center square.
The engine compartment fuse box is located on the driver side of the engine compartment.
The rear compartment fuse block is behind a trim panel on the side of the rear compartment. Remove the trim plate to access the fuse block.
Assignment of the fuses in the engine compartment
Fuse Data
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No. Description F01 Starter 1 F02 Starter 2 F03 Lambda sensor 1 F04 Engine control module F05 2018-2020: FlexFuel sensor F06 Transmission control module F07 – F08 Engine control module F09 Air conditioning clutch F10 Canister vent solenoid F11 Fuel system F12 Front heated seats F13 Afterboil pump F14 – F15 Lambda sensor 2 F16 2018: Fuel injectors-odd F17 2018: Fuel injectors – even. F18 2018-2020: 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. F24 – F25 -/Diesel fuel heater (diesel only) F26 – F27 Antilock brake valves F28 LD trailer F29 Rear window defogger F30 Mirror defroster F31 — F32 Variable functions F33 – F34 Horn F35 Vacuum pump. F36 2018-2021: Right high-beam headlamp F37 Left high-beam headlamp F38 Automatic headlamp leveling F39 Fog lamps F40 – F41 Transmission range control module F42 Motorized headlamp F43 2018: Fuel pump. F44 Interior rearview mirror F45 2018: Canister vent solenoid. F46 Driver side Ventilated Seat F47 Steering column lock assembly F48 Rear wiper F49 – F50 Heated steering wheel F51 2018: Right headlamp. F52 Engine control module/ Transmission control F53 – F54 Front wiper. F55 Front wiper speed/ Control F56 – F57 2018: Left headlamp.
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Assignment of the relays in the engine compartment
Fuse Data
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No. Description K01 Starter solenoid K02 Air conditioning control K03 from 2019: Engine control module K04 Wiper control K05 Starter Solenoid / Starter pinion K06 -/Fuel heater (diesel only) K07 – K08 – K09 Wiper speed K10 – K11 – K12 2018-2021: High-beam headlamps K13 2018-2021: 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 *K20 – *K21 Rear washer *K22 Front washer *K23 Wiper control
* PCB relays are not serviceable.
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Assignment of the fuses in the Instrument panel
Fuse Data
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No. Description F01 DC AC inverter F02 Front windows F03 Trailer brake F04 Heating, ventilation, and air conditioning blower F05 Body control module 2 F06 Central gateway module (CGM) F07 – F08 Body control module 3 F09 Amplifier F10 – F11 – F12 – F13 – 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 F26 – F27 Power seats F28 Rear windows F29 – 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. F37 Cigarette lighter F38 OnStar F39 Instrument panel USB F40 Camera module/ Liftgate module F41 2018-2020: Parking assist module F42 Radio
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Assignment of the relays in the Instrument panel
Fuse Data
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No. Description K01 Deadbolt K02 Retained accessory power K03 Liftgate K04 – K05 Logistics
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Assignment of the circuit breakers in the Instrument panel
Fuse Data
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No. Description CB1 Front auxiliary power outlet. CB2 Auxiliary power outlet console
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Assignment of the fuses in the Rear Compartment (2018-2022)
Fuse Data
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No. Description F1 2018-2019: Exhaust fuel heater. F2 Liftgate F3 Trailer auxiliary power F4 2018: Power seats. 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 F12 — F13 Trailer parking lamp F14 Right trailer turn signal lamp F15 2018-2021: Left parking lamp F16 2018-2021: Right parking lamp F17 2020-2022: Video processing module F18 Left trailer turn signal lamp F19 All-wheel drive F20 Lumbar F21 Rear auxiliary power outlet F22 Rear drive unit
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Assignment of the relays in the Rear Compartment
Fuse Data
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No. Description 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).
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