Carbon Steel Shock Extenders Will Allow You To Utilize OEM Shock Lengths On Leveled To Lifted Vehicles Without The Need For For Extended Shocks. 02-06 Escalade 02-06 Avalanche 1500 99-07 Silverado/Sierra 1500 01-07 Suburban 1500 00-06 Tahoe 99-06 Yukon/ Yukon XL 1500.