One problem related to catalytic convertor has been reported for the 2012 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 GMC Terrain based on all problems reported for the 2012 Terrain.
The contact owns a 2012 GMC Terrain. The contact stated when driving approximately 25 mph and stopped the vehicle stalled. There was an engine power reduced warning light on the instrument panel. The vehicle was taken to the unknown local mechanic which diagnosed an unknown failure. The vehicle was repaired; however, the failure reoccurred. The manufacturer was not notified of the failure. The approximate failure mileage was 125,000.