The Terrain is one of the smallest vehicles in the GMC family, and if you're looking for a used one, there’s a good chance that the size is an appealing part of it. It may be smaller than its siblings, but it’s just as mighty. We’ll take a look at some important specs for the Terrain, as well as what to check when buying a used GMC Terrain to make sure that you’re getting the right one for you and your family.