ReadyLIFT® OEM style rear block kits are now available for the new 2011-UP GM 2500HD single rear wheel pickups with the factory Trailer Package rear springs. These Rear Block Kits include (2) Rear Blocks, (4) E-Coated U-Bolts, (8) Nuts and Washers and will safely lift the rear of your 2011-Up 2WD and 4WD 8-lug Single Rear Wheel GM trucks with trailer package springs 1 Inch. Based on OEM designs and never made out of light weight extrusions our 1 Inch GM Blocks are made from cast iron just like the factory blocks, insuring maximum strength and reliability. ReadyLIFT® Block Kits will put a slight rake back in your Truck for hauling or towing and are designed to work with your ReadyLIFT® Suspension Leveling Kit