Extang Full Tilt SL Truck Bed Tonneau Cover | 38650 | fits Chevy/GMC Silverado/Sierra (6 1/2 ft) 07-13, 2014-2500HD & 3500HD, works with/without track system Incredible Versatility; Roll Up, Lift Up, or Lift Off! Gas Shocks Easily Removed Using Ball And Joint Snap Release Hinged At Cab Rail For FullTilt Action Gull Wing Latches Secure Tonneau Without Restricting Cargo Space Vehicle Specific For A Perfect Fit