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 2018-2023 Owners Manual: Increasing Speed While Using Cruise Control


    If the cruise control system is already activated: Press and hold +RES on the steering wheel until the vehicle accelerates to the desired speed, then release it. To increase the speed in small increments, briefly press +RES. For each press, the vehicle goes about 1 km/h (1 mph) faster. The speedometer reading can be displayed in either English or metric units. See Instrument Clu..

    GMC Terrain 2018-2023 Owners Manual: Airbag System


    The vehicle has the following airbags: A frontal airbag for the driver A frontal airbag for the front outboard passenger A seat-mounted side impact airbag for the driver A seat-mounted side impact airbag for the front outboard passenger A roof-rail airbag for the driver and the passenger seated directly behind the driver A roof-rail airbag for the front outboard passenger and..

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