GMC Terrain Quiz
Driving and Operation

Lighting Conditions Affecting ACC

In this manual: Driving and Operation
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

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

  • There are changes in brightness, such as entering and exiting tunnels, under bridges, and overpasses.
  • Low sun angles cause the camera to not detect objects, or make it more difficult to detect objects in the same lane.
  • Poor lighting in the evening or early morning.
  • There are multiple changes in brightness or shadows along the roadway.
  • In a tunnel without headlights on, or in a tunnel when a vehicle ahead has its tail lights off.
  • Exposed to strong light from oncoming traffic ahead of the vehicle, such as high beams from oncoming vehicles.

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