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 2018-2022 Owners Manual: Rear Cross Traffic Alert (RCTA)


    If equipped, when the vehicle is shifted into R (Reverse), RCTA displays a red warning triangle with a left or right pointing arrow to warn of traffic coming from the left or right. This system detects objects coming from up to 20m (65 ft) from the left or right side of the vehicle. When an object is detected, either three beeps sound from the left or right or three Safety Alert Seat pu..

    GMC Terrain 2018-2022 Owners Manual: Headlamp High/Low-Beam Changer anf Flash-to-Pass


    Headlamp High/Low-Beam Changer Push the turn signal lever away from you and release, to turn the high beams on. To return to low beams, push the lever again or pull it toward you and release. This indicator light turns on in the instrument cluster when the high-beam headlamps are on. Flash-to-Pass The flash-to-pass feature works with the low beams or Daytime Running Lamps (DRL) on or off...

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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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