Revolution Soft Roll Up Tonneau Cover Fits 6.6 ft. Bed; Type: Soft Roll Up Tonneau; Installation Time: 15 Minutes; Mounting System: No Drilling, No Damage. Horseshoe Shaped Pin. Clamp Installs directly into pre-drilled holes in provided siderails; Material: Aluminum Rails with Vinyl Tarp; Shipping Method: UPS; Warranty: Lifetime Frame & Tarp CHEVROLET GMC SIERRA 1500 SIERRA 2500 HD SIERRA 3500 HD SILVERADO 1500 SILVERADO 2500 HD SILVERADO 3500 HD BASE CUSTOM DENALI HIGH COUNTRY LS LT LTZ SLE SLT SSV WT 2014 2015 2016 4.3L LV3 (262) Vortec 5.3L Ecotec3 L83 (325) 6.2L Ecotec3 L86 (376) 6.6L Duramax Turbo Diesel LML (400) 6L GEN IV CNG LC8 Vortec (364) 6L GEN IV Flex L96 Vortec (364) 6L GEN IV Flex LC8 Vortec (364) 6L GEN IV L96 Vortec (364) 6L GEN IV LC8 Vortec (364) CNG DIESEL FLEX GAS Extang Extang Revolution Soft Roll Up Tonneau Cover - 54450 54450 Tonneau Cover