Pick this Lo Pro when your truck is a 2007-2013 Chevrolet Silverado 1500/2500/3500 / GMC Sierra 1500/2500/3500 with the 6'7" (78.8") bed. It is the version for trucks with GM's cargo management system. Its side rails mount just inside the bed walls instead of on top, so the closed cover rides only 3/4" above the bed rails. Pull the one-finger trigger latch, roll the cover to the cab and buckle both retainer straps for nearly full bed access, or lift it off without tools using the quick-release system. The tear-resistant, leather-grain vinyl is held tight by a patented self-tensioning spring that compensates as the material expands and contracts. Fitting it takes hand tools and clamps rather than a drill; TruXedo calls it a Level 1 job of under 1 hour. It comes with TruXedo's limited lifetime warranty, covering hard parts and fabric alike.