GMC Terrain: Keys, Doors, and Windows

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...

Keys and Locks

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Other information:

GMC Terrain 2018-2025 Owners Manual: Exterior Lamp Controls

The exterior lamp control is on the instrument panel to the left of the steering column. There are four positions. : Turns the exterior lamps off and deactivates the AUTO mode. Turn to again to reactivate the AUTO mode. In Canada, the headlamps will automatically reactivate when the+ vehicle is shifted out of P (Park). AUTO : Turns the exterior lamps on and off automatically depending ..

GMC Terrain 2018-2025 Owners Manual: Turn and Lane-Change Signals

Move the lever all the way up or down to signal a turn. An arrow on the instrument cluster will flash in the direction of the turn or lane change. Raise or lower the lever until the arrow starts to flash to signal a lane change. Hold it there until the lane change is complete. If the lever is moved momentarily to the lane change position, the arrow will flash three times. The lever retur..