GMC Terrain: Exterior Lighting / Hazard Warning Flashers

Automatic Headlamp System

When the exterior lamp control is set to AUTO and it is dark enough outside, the headlamps come on automatically. There is a light sensor on top of the instrument panel...

Turn and Lane-Change Signals

Move the lever all the way up or down to signal a turn. An arrow on the instrument cluster will flash in the direction of the turn or lane change. Raise or lower the lever until the arrow starts to flash to signal a lane change...

Other information:

GMC Terrain 2018-2025 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..

GMC Terrain 2018-2025 Owners Manual: Vehicle Alarm System

This vehicle has an anti-theft alarm system. The indicator light, on the instrument panel near the windshield, indicates the status of the system: Off : Alarm system is disarmed. On Solid : Vehicle is secured during the delay to arm the system. Fast Flash : Vehicle is unsecured. A door, the hood, or the liftgate is open. Slow Flash : Alarm system is armed. Arming the Alarm System Turn o..