Dollar for Dollar, the 66-3085 ReadyLift Leveling Kit for the late model GM 1500 series 2WD & 4WD Trucks is the BEST choice you can make -- Guaranteed
For information about tire and wheel sizes please visit the ReadyLift Tire Sizing and Calculator Page

Also Recommended.
ReadyLift Tow Package 2" and 3" Rear Lift Block Kits (66-3002 and 66-3003)

ReadyLift® OEM style rear block kits are now available for 1999 and newer GM Trucks. 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 Truck an additional 1” to 3” depending on application. Based on OEM designs and never made out of light weight extrusions our 2" and 3" GM Blocks are made from cast iron and have Anti-Rotation ears built-In. Fits 1999-2012 classic and new body style 6-lug model GM trucks. New models with OEM 1.25" blocks will want to take advantage of the additional 1.0" or 1.75" of lift for towing and hauling, particularly when using a front leveling kit while 1999-2007 classic body style 6-lug 4wd trucks will replace the factory 2" block for an additional 1" of lift with the 66-3003 3" block, or in the case of '99-07 1500 2WD trucks, take full advantage of our 66-3002 2" rear lift block.
ReadyLift® Block Kits will put a slight rake back in your Truck for hauling or towing and are designed to work in concert with your ReadyLift® Suspension Leveling Kit. Like all ReadyLift® products these block kits come with our Lifetime Warranty.
2" OE Style Rear Lift Block and 3" Chevy Rear Lift Blocks

Watch the installation video!
Black 2009 GMC Sierra with ReadyLift 66-3085 & 33x12.50 tires on 20x9 RBP R94 wheels with +10mm (5.4) backspacing.

For the ultimate in leveling lift technology and looks, you might want to check out the all new T6 Billet series of ReadyLIFT leveling kits for your truck.
NEW T6 3085 anodized billet aluminum leveling kit