GMC Terrain Quiz
Lighting

Automatic Headlamp System

In this manual: Lighting
Introduction — 1In Brief — 46Keys, Doors and Windows — 37Seats and Restraints — 60Storage — 6Instruments and Controls — 58Lighting — 16Infotainment System — 1Climate Control — 8Driving and Operation — 128Vehicle Care — 75Service and Maintenance — 8Technical Data — 5Customer Information — 18OnStar — 6Connected Services — 4
~1min read

When the exterior lamp control is set to AUTO and it is dark enough outside, the headlamps will turn on automatically.

GMC Terrain. Automatic Headlamp System

The light sensor is located on top of the instrument panel. Do not cover the sensor; otherwise the headlamps may turn on when not needed.

The system may also turn on the headlamps when driving through a garage or tunnel.

When it is light enough outside, the headlamps turn off or may switch to Daytime Running Lamps (DRL).

The automatic headlamp system turns off when the exterior lamp control is moved toGMC Terrain. Automatic Headlamp Systemor the ignition is off.

Headlamps with Wipers

If the windshield wipers are activated during daytime with the engine running and the exterior lamp control is in AUTO, the headlamps, parking lamps, and other exterior lamps will turn on. The time delay before the lamps turn on depends on the wiper speed. When the wipers are not operating, these lamps turn off. Move the exterior lamp control toGMC Terrain. Automatic Headlamp SystemorGMC Terrain. Automatic Headlamp Systemto disable this feature.

Test yourself

A quick GMC Terrain quiz: every answer comes with an explanation and a link to the manual page.