GMC Terrain: Keys and Locks / Automatic Door Locks

The doors will lock automatically when all doors are closed, the ignition is on, and the vehicle is shifted out of P (Park).

If a vehicle door is unlocked and then opened and closed, the doors will lock either when your foot is removed from the brake or the vehicle speed becomes faster than 13 km/h (8 mph).

To unlock the doors:

  • Press GMC Terrain. Automatic Door Locks on the power door lock switch.
  • Shift into P (Park).

Automatic door locking cannot be disabled. Automatic door unlocking can be programmed. See Vehicle Personalization.

    Delayed Locking

    This feature delays the actual locking of the doors until five seconds after all doors are closed. Delayed locking can only be turned on when the Open Door Anti-Lockout feature has been turned off...

    Lockout Protection

    If the ignition is on or in ACC/ ACCESSORY and the power door lock switch is pressed with the driver door open, all the doors will lock and only the driver door will unlock...

    Other information:

    GMC Terrain 2018-2021 Owners Manual: Approaching and Following a Vehicle


    The vehicle ahead indicator is in the instrument cluster. It only displays when a vehicle is detected in your vehicle’s path moving in the same direction. If this symbol is not displaying, ACC will not respond to or brake for vehicles ahead. ACC automatically slows the vehicle down and adjusts vehicle speed to follow a detected vehicle ahead at the selected following gap...

    GMC Terrain 2018-2021 Owners Manual: Engine Compartment Fuse Block


    To remove the fuse block cover, squeeze the clips on the cover and lift it straight up. See Engine Compartment Overview. Caution Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component...

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      Vehicle Messages

      Messages displayed on the DIC indicate the status of the vehicle or some action that may be needed to correct a condition. Multiple messages may appear one after another.

      The messages that do not require immediate action can be acknowledged and cleared by pressing V. The messages that require immediate action cannot be cleared until that action is performed.

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