We don't have a lot of GMC Terrain fuel system problems on file — feel free to add yours here. The most common Terrain fuel system problems cost $600 to fix & occur at 21,000 miles. Click on a year below.

Worst Fuel System Problems
poor gas mileage 2015 GMC Terrain
poor MPG 2012 GMC Terrain
fuel line snapped while driving 2013 GMC Terrain