2001-2010 - GMC Sierra 1500HD, 2500, 2500HD, 3500 (2 & 4wd). 2001-2010 - Chevy Silverado 1500HD, 2500, 2500HD, 3500 (2 & 4wd). 01-10 GM 8Lug Bilstein front shocks. These shocks are made exclusively for this application, giving you the needed travel to optimize ride quality and suspension function.