Product updated on 2020-11-09, BDS Suspension - BDS:011457, 1999-2013 Silverado / Sierra 5 inch rear block kit, These blocks will provide 3 inches of lift 99-06 GM 1500 and 4 inches of lift on 07+ GM 1500. Either lift will require the removal of the factory blocks. If factory blocks are not pulled than the lift will be 5 inches. Will not get 5 inches of lift, wil, ,