GMC Terrain Quiz
Instruments and Controls

Diesel Exhaust Fluid (DEF) Warning Light

In this manual: Instruments and Controls
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
GMC Terrain. Diesel Exhaust Fluid (DEF) Warning Light

This light and the Driver Information Center (DIC) message and a chime will alert you when there is a problem with DEF.

If the DEF problem is not corrected, the light will continue to flash. The vehicle speed may also be limited. Refer to Diesel Exhaust Fluid.

Test yourself

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