Auto Ventshade 192956 In-Channel Ventvisor Side Window Deflector, 2-Piece Set for Standard Cab 1999-2007 Silverado 1500, 1999-2004 Silverado 2500, 2001-2004 Sierra 2500, 2001-2006 Silverado & Sierra 3500, 2001-2006 Silverado 2500HD & Classic, 2001-2006 Sierra 2500HD | Also fits 1999-2007 Sierra with Extended Cab Installs in window channel for a sleek, streamlined appearance; Tinted, reinforced acrylic is UV and scratch-resistant and is car wash safe Allows fresh air to naturally circulate through open windows while keeping the rain out Reduces heat build up in parked vehicles by allowing window to be kept partially open Installs in minutes, no drilling or special hardware required; Please note special instructions for In-Channel Ventvisors on installation guide Proudly made in the USA and backed by a Limited Lifetime Warranty