GMC Terrain: Setting Adaptive Cruise Control / Increasing Speed While ACC Is at a Set Speed

If ACC is already activated, do one of the following:

  • Use the accelerator to get to the higher speed. Press SET–. Release SET– and the accelerator pedal. The vehicle will now cruise at the higher speed.

    When the accelerator pedal is pressed, ACC will not brake because it is overridden. The ACC indicator will turn blue on the instrument cluster.

  • Press and hold RES+ until the desired set speed is displayed, then release it.
  • To increase vehicle speed in smaller increments, press RES+ briefly. For each press, the vehicle goes about 1 km/h (1 mph) faster.
  • To increase vehicle speed in larger increments, hold RES+. While holding RES+, the vehicle speed increases to the next 5 km/h (5 mph) step, then continues to increase by 5 km/h (5 mph) at a time.

When it is determined that there is no vehicle ahead or the vehicle ahead is beyond the selected following gap, then the vehicle speed will increase to the set speed.

Reducing Speed While ACC Is at a Set Speed

If ACC is already activated, do one of the following:

  • Use the brake to get to the desired lower speed. Release the brake and press SET–. The vehicle will now cruise at the lower speed.
  • Press and hold SET– until the desired lower speed is reached, then release it.
  • To decrease the vehicle speed in smaller increments, press SET− briefly. For each press, the vehicle goes about 1 km/h (1 mph) slower.
  • To decrease the vehicle speed in larger increments, hold SET−. While holding SET−, the vehicle speed decreases to the next 5 km/h (5 mph) step, then continues to decrease by 5 km/h (5 mph) at a time.

    Resuming a Set Speed

    If the ACC is set at a desired speed and then the brakes are applied, ACC is disengaged without erasing the set speed from memory. To begin using ACC again, press RES+ briefly while moving more than 5 km/h (3 mph)...

    Selecting the Follow Distance Gap

    When a slower moving vehicle is detected ahead within the selected following gap, ACC will adjust the vehicle's speed and attempt to maintain the follow distance gap selected...

    Other information:

    GMC Terrain 2018-2024 Owners Manual: Driver Information Center (DIC)


    The DIC display is in the instrument cluster. It shows the status of many vehicle systems. or : Press to move up or down in a list. or : Press to move between the interactive display zones in the cluster. : Press to open a menu or select a menu item...

    GMC Terrain 2018-2024 Owners Manual: Tire Terminology and Definitions


    Air Pressure : The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch). Accessory Weight : The combined weight of optional accessories. Some examples of optional accessories are automatic transmission, power windows, power seats, and air conditioning...

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