Today on our 2013 GMC Terrain, we're going to be test fitting the Thule Force XXL roof top cargo box, with 21 cubic feet of storage space in arrow skin black. It's part #TH626. With our Thule Rapid Crossroad's roof rack system already installed on the Terrain, we'll begin our test fit by placing our cargo box directly onto our load bar. We've found this is the best time to get our feet in line so… see more >