Built for the 6'6" (78") bed on the 1999-2007 GMC Sierra 1500 / Chevrolet Silverado 1500 and 2001-2007 GMC Sierra 2500/3500 / Chevrolet Silverado 2500/3500, this is TruXedo's Lo Pro soft roll-up. Choose it for trucks without the composite (ProTec) bed on 1999-2007 trucks. Because the rails tuck inside the bed rather than sitting on the rail tops, the vinyl closes just 3/4" above the bed rails. A patented automatic tension control system keeps the vinyl tight as it grows in summer heat and shrinks in winter cold. Fitting it takes hand tools and clamps rather than a drill; TruXedo calls it a Level 1 job of under 1 hour. For tall loads, roll it up and strap it at the cab, or use the toolless quick release to take the whole cover off. TruXedo's limited lifetime warranty applies to the fabric as well as the frame.