GMC Terrain: Setting Adaptive Cruise Control / 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.
Press 
on the steering wheel to
adjust the following gap. Each press
cycles the gap button through three
settings: Far, Medium, or Near.
When pressed, the current gap setting displays briefly on the instrument cluster. The gap setting will be maintained until it is changed.
Since each gap setting corresponds to a following time (Far, Medium, or Near), the following distance will vary based on vehicle speed. The faster the vehicle speed, the further back your vehicle will follow a vehicle detected ahead. Consider traffic and weather conditions when selecting the following gap. The range of selectable gaps may not be appropriate for all drivers and driving conditions.
Changing the gap setting automatically changes the alert timing sensitivity (Far, Medium, or Near) for the Forward Collision Alert (FCA) feature. See Forward Collision Alert (FCA) System.
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...
Alerting the Driver
If ACC is engaged, driver action
may be required when ACC cannot
apply sufficient braking because of
approaching a vehicle too rapidly.
When this condition occurs, six red
lights will flash on the windshield...
Other information:
GMC Terrain 2018-2023 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...
GMC Terrain 2018-2023 Owners Manual: Tire Chains
Warning Do not use tire chains. There is not enough clearance. Tire chains used on a vehicle without the proper amount of clearance can cause damage to the brakes, suspension, or other vehicle parts. The area damaged by the tire chains could cause loss of control and a crash...
