GMC Terrain: In Brief / Performance and Maintenance

Sunroof

Sunroof Switch Sunshade Switch If equipped, the sunroof only operates when the ignition is on or in ACC/ACCESSORY, or when Retained Accessory Power (RAP) is active...

Traction Control/Electronic Stability Control

The Traction Control System (TCS) limits wheel slip. The system is on when the vehicle is started. The StabiliTrak/Electronic Stability Control (ESC) system assists with directional control of the vehicle in difficult driving conditions...

Other information:

GMC Terrain 2018-2021 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 2018-2021 Owners Manual: Brake System Warning Light

The vehicle brake system consists of two hydraulic circuits. If one circuit is not working, the remaining circuit can still work to stop the vehicle. For normal braking performance, both circuits need to be working This light should come on briefly when the engine is started...