With the launch of the new Leveling Kit ReadyLIFT is also releasing a new Rear Block Kit. Rear blocks will put a slight rake back in your truck for hauling or towing and are designed to work with your ReadyLIFT Suspension Leveling Kit. ReadyLIFT OEM style rear block kits are available for the 2020-2024 GM 2500/3500 HD single rear wheel pickups. Based on OEM designs and never made out of lightweight extrusions our 1” GM Blocks are made from cast iron just like the factory blocks, ensuring maximum strength and reliability.