Three problems related to air bag light on have been reported for the 2011 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 GMC Terrain based on all problems reported for the 2011 Terrain.
Airbag light came on at 125k miles. Known problem on this year/make/model is airbag sensor on passenger side. 90k miles timing chain replaced. 154k miles timing chain broke 3 qrts of oil needed every 2k miles 154k miles transmission leaking fluid 100k miles catalytic converter needed replaced 125k miles downstream air sensor needed replaced 150k miles upstream air sensor needed replaced solenoids need replaced every 50k miles.
Aig bag warning indicator light comes on during humid conditions.
The airbag readiness light is illuminated and "service air bag" message is displayed. There have been recalls for this on 2011 GMC Terrains but when I looked it up it says my vehicle isn't covered in the recall. I'm pretty sure that this, in combination with the takata air bag recall, has affected more Gmcs than the company cares to admit. This recall should be extended to all 2011 GMC Terrains. The service air bag light and air bag warning bell constantly come on while I'm driving my car. It comes on when I start the car and continues to go on and off the entire time I'm driving.