Extang Revolution Tonneau Cover Features: Roll Up Design w/No Snaps Or Velcro Improve Gas Mileage By Ten Percent No Drilling; No Damage Instant Fastening And A Perfect Fit Stylish Near Flush Fit Fast Easy Access To Bed And Cargo MaxCare Warranty;Lifetime Warranty Frame And Tarp Height: 6.00 Width: 10.00 Length: 78.00 Fitment: 2007/GMC/Sierra 2500 HD Classic/WT Standard Cab Pickup 2-Door/8.1L 496Cu. In. V8 GAS OHV Naturally Aspirated::Bed Length = 78.0, Bed Side = Fleetside^^2007/GMC/Sierra 2500 HD Classic/WT Standard Cab Pickup 2-Door/6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged::Bed Length = 78.0, Bed Side = Fleetside^^2007/GMC/Sierra 2500 HD Classic/WT Standard Cab Pickup 2-Door/6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated::Bed Length = 78.0, Bed Side = Fleetside^^2007/GMC/Sierra 2500 HD Classic/WT Extended Cab Pickup 4-Door...