GMC Terrain: Performance and Maintenance / Roadside Assistance Program

U.S.: 1-888-881-3302

TTY Users (U.S. Only): 1-888-889-2438

Canada: 1-800-268-6800

New GMC owners are automatically enrolled in the Roadside Assistance Program.

See Roadside Assistance Program.

    Diesel Exhaust Fluid

    Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. The DEF system must be maintained for the vehicle to run properly...

    Keys, Doors, and Windows

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    Other information:

    GMC Terrain 2018-2021 Owners Manual: Off-Road Driving


    All-wheel-drive vehicles can be used for off-road driving. Vehicles without all-wheel drive and vehicles not equipped with All Terrain (AT) or On-Off Road (OOR) tires must not be driven off-road except on a level, solid surface. To contact the tire manufacturer for more information about the original equipment tires, see the warranty manual. Controlling the vehicle is the key to successf..

    GMC Terrain 2018-2021 Owners Manual: License Plate Lamp


    Lamp Assembly Bulb Assembly Bulb Socket Bulb Lamp Assembly To replace one of these bulbs: Open the liftgate partway. See Liftgate. Push the lamp assembly outboard to remove. Pull the lamp assembly down to remove it from the liftgate. Turn the bulb socket (1) counterclockwise to remove it from the lamp assembly (3). Pull the bulb (2) straight out of the bulb socket (1). Pu..

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      Tire Pressure Light

      GMC Terrain. Tire Pressure Light

      For vehicles with the Tire Pressure Monitor System (TPMS), this light comes on briefly when the engine is started. It provides information about tire pressures and the TPMS.

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