GMC Terrain: Doors / Setting the 3/4 Mode

To change the position the liftgate stops at when opening:

  1. Select MAX or 3/4 mode and power open the liftgate.
  2. Stop the liftgate movement at the desired height by pressing any liftgate switch. Manually adjust the liftgate position if needed.
  3. Press and hold GMC Terrain. Setting the 3/4 Mode next to the pull cup on the bottom of the liftgate until the turn signals flash and a beep sounds. This indicates the setting has been recorded.

The liftgate cannot be set below a minimum programmable height. If there is no light flash or sound, then the height adjustment may be too low.

    Obstacle Detection Features

    If the liftgate encounters an obstacle during a power open or close cycle, the liftgate will automatically reverse direction and move a short distance away from the obstacle...

    Manual Operation

    Select OFF to manually operate the liftgate. Caution Attempting to move the liftgate too quickly and with excessive force may result in damage to the vehicle...

    Other information:

    GMC Terrain 2018-2022 Owners Manual: Loss of Control


    Skidding There are three types of skids that correspond to the vehicle's three control systems: Braking Skid — wheels are not rolling. Steering or Cornering Skid — too much speed or steering in a curve causes tires to slip and lose cornering force...

    GMC Terrain 2018-2022 Owners Manual: Automatic Dimming Mirror and Reverse Tilt Mirrors


    Automatic Dimming Mirror The vehicle has an automatic dimming outside mirror on the driver side. The mirror will adjust for the glare of headlamps behind you. Reverse Tilt Mirrors If equipped with memory seats, the passenger and/or driver mirror tilts to a preselected position when the vehicle is in R (Reverse), if enabled...

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