Auto Ventshade 15749 Rear Window Ventvisor Side Window Deflector Set for 1999-2007 Silverado & Sierra 1500, 1999-2004 Silverado & Sierra 2500, 2001-2006 Silverado & Sierra 2500HD & 3500, 2007 Sierra 2500HD & Classic with Extended Cab Lets fresh air in and keeps rain out; Allows fresh air to circulate removing stale air and odors Reduces interior wind noise and mirror fogging; Allows window to be cracked, reducing heat build up in parked vehicles Precision-engineered and custom molded for an exact fit; Tinted, reinforced acrylic is UV and scratch-resistant No special hardware or drilling required, attaches with 3M automotive-grade adhesive Proudly made in the USA and backed by a Limited Lifetime Warranty