ReadyLIFT OEM style 2 Inch Tall rear block kits are now available for the new 2011-UP GM 2500 HD 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 2". Based on OEM designs and never made out of light weight extrusions our 1” 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. Like all ReadyLift products these block kits come with our Lifetime Warranty. For Use Only on 2500HD trucks that have the factory Trailer Package rear springs. ReadyLIft Features OEM style design Made from cast iron, not light weight extrusions Built in locator pin, not pressed in Puts the rake back in your truck for towing and hauling Lifetime Warranty Installation time is approximately 1+ hours. Works Great with our 66-3011 8-lug GM Leveling Kits