GMC Terrain: Performance and Maintenance / 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 2018-2026 Owners Manual: Manually Recalling Memory Positions

Press and hold 1, 2, or to recall the previously saved memory positions. To stop Manual Memory Recall movement, release 1, 2, or or press any of the following controls: Power seat Memory SET Power mirror, with the driver or passenger side mirror selected Power steering wheel, if equipped ..

GMC Terrain 2018-2026 Owners Manual: Car Wash Mode

This vehicle includes a Car Wash Mode that allows the vehicle to remain in N (Neutral) for use in automatic car washes. Car Wash Mode is not to be used for vehicle towing. If the vehicle needs to be towed, see Towing the Vehicle Caution The vehicle is not designed to stay in N (Neutral) for extended periods of time. It will automatically shift into P (Park) if left in Car Wash Mode. Car ..