GMC Terrain: Setting Adaptive Cruise Control / Driving in Narrow Lanes

Vehicles in adjacent traffic lanes or roadside objects may be incorrectly detected when located along the roadway.

    Objects Not Directly in Front of Your Vehicle

    The detection of objects in front of the vehicle may not be possible if: The vehicle or object ahead is not within your lane. The vehicle ahead is shifted, not centered, or is shifted to one side of the lane...

    Do Not Use ACC on Hills and When Towing a Trailer

    Do not use ACC when driving on steep hills or when towing a trailer. ACC will not detect a vehicle in the lane while driving on steep hills. If the brakes are applied, ACC disengages...

    Other information:

    GMC Terrain 2018-2025 Owners Manual: (TCS) / (ESC). Turning the Systems Off and On (Uplevel Cluster)


    Caution Do not repeatedly brake or accelerate heavily when TCS is off. The vehicle driveline could be damaged. At speeds of 56 km/h (35 mph) or above, this ability to turn off or on is disabled. TCS and StabiliTrak/ESC can be turned off or on using the DIC controls as follows: Press or to scroll to the Options application...

    GMC Terrain 2018-2025 Owners Manual: Increasing Speed While Using Cruise Control


    If the cruise control system is already activated: Press and hold +RES on the steering wheel until the vehicle accelerates to the desired speed, then release it. To increase the speed in small increments, briefly press +RES. For each press, the vehicle goes about 1 km/h (1 mph) faster...

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