Lund 184040 Ventvisor Elite Side Window Defectors, 4-Piece Set for 2007-2013 Silverado & Sierra 1500; 2007-2013 GMC Sierra 2500 HD, 3500 HD | Fits Extended Cab Let fresh air circulate through partially opened windows while keeping the rain and other elements out; Reduces interior wind noise and window fogging and keeps car interior cooler when parked in the sun Features an in-channel mounting design crafted from proprietary high-performance material No special hardware or drilling required; Car wash safe Blue-Gray finish provides optical clarity and complements Lund Interceptor hood shield Proudly made in the USA and backed by a limited lifetime warranty