GMC Terrain: Setting Adaptive Cruise Control / Lighting Conditions Affecting ACC

GMC Terrain 2018-2026 Owners Manual / Driving and Operating / Cruise Control / Setting Adaptive Cruise Control / Lighting Conditions Affecting ACC

The ACC front camera can be affected by poor lighting conditions, and ACC may have limited performance when:

There are changes in brightness, such as entering and exiting tunnels, bridges, and overpasses.
Low sun angles cause the camera to not detect objects, or it is more difficult to detect objects in the same traffic lane.
Lighting is poor in the evening or early morning
There are multiple changes in brightness or shadows along the vehicle roadway.
In a tunnel without the headlamps on, or in a tunnel when there is a vehicle in front that does not have its taillamps on.
Subjected to strong light from opposing lane traffic in the front of the vehicle, such as high-beam headlamps from oncoming traffic.

Weather Conditions Affecting ACC

If the interior temperature is extremely high, the instrument cluster may indicate that ACC is temporarily unavailable. This can be caused by extreme hot weather conditions with direct sunlight on the front camera...

Accessory Installations and Vehicle Modifications

Do not install or place any object around the front camera windshield area that would obstruct the front camera view. Do not install objects on top of the vehicle that overhang and obstruct the front camera, such as a canoe, kayak, or other items that can be transported on a roof rack system...

Other information:

GMC Terrain 2018-2026 Owners Manual: Universal Remote System Programming

If equipped, these buttons are in the overhead console. This system can replace up to three remote control transmitters used to activate devices such as garage door openers, security systems, and home automation devices. These instructions refer to a garage door opener, but can be used for other devices...

GMC Terrain 2018-2026 Owners Manual: Irregular Objects Affecting ACC

ACC may have difficulty detecting the following objects: Vehicles in front of your vehicle that have a rear aspect that is low, small, or irregular An empty truck or trailer that has no cargo in the cargo bed Vehicles with cargo extending from the back end Non-standard shaped vehicles, such as vehicle transport, vehicles with a side car fitted, or horse carriages Vehicles that..