1999-2006 Chevy Pickup Silverado 1500 LD 6.6 ft. bed, 2 & 4 wd1999-2006 Chevy Pickup Silverado 1500 LD 8 ft. bed 2 & 4 wd1999-2004 Chevy Pickup Silverado 2500 LD 6.6 ft. bed 2 & 4 wd2007 Chevy (Classic) Pickup Silverado 1500 LD 6.6' & 8' Bed 2 & 4 wd2007-2013 Chevy Pickup Silverado 1500 LD 6.6 Bed 2 & 4 wd (New body Style)2007-2013 1999-2006 GMC Pickup Sierra 1500 LD 6.6 & 8 8 Bed 2 & 4 wdFOR INSTALLATION INSTRUCTIONS SEE PRODUCT OVERVIEW