Straight Axle Pickup Chevy, GMC Block & U-Bolt Kits

We offer a large selection of rear block and u-bolt kits for Chevy and GMC truck, SUV and SUT with rear leaf spring suspension. Rear lift block kits include a pair of rear blocks with u-bolts and hardware. They are a simple way to raise the rear of your vehicle if your leaf springs have started to sag. Unlike an add-a-leaf, rear lift blocks will not adversely affect your ride quality.

If you use your vehicle for hauling or towing, the addition of a block kit will maintain the factory rake of your vehicle. If you don't find the combination you're looking for, blocks and u-bolts are sold individually for a custom application.

All rear block kits listed are designed for the rear of your vehicle only. The leaf springs must be above the axle.

    For high quality, made-in-America products, choose a Superlift rear block kit. These kits include a pair of cast iron blocks along with u-bolts, locking nuts and washers.
    Vehicle Year Lift Price Item #    

    Rough Country rear block kits contain a pair of cast iron blocks and 4 u-bolts with nuts and washers. These are the same blocks used with Rough Country lift kits.
    Vehicle Year Lift Price Item #    
    1500 Pickup 2&4WD
    1973-87 2"
    $39.87
    6510 HK More Info
    1500 Pickup 2&4WD
    1973-87 3"
    $45.95
    6535 HK More Info
    1500 Pickup 2&4WD
    1973-87 4.5"
    $72.63
    6511 HK More Info
    1500 Pickup 4WD
    1969-72 1.5"
    $45.95
    6531 HK More Info
    1500 Pickup 4WD
    1969-72 2"
    $45.95
    6532 HK More Info
    1500 Pickup 4WD
    1969-72 3"
    $45.95
    6533 HK More Info
    1500 Pickup 4WD
    1969-72 4.5"
    $75.26
    6515 HK More Info

    Skyjacker Rear Block Kits include a pair of cast iron blocks with 4 u-bolts, Nylon insert lock nuts and washers. Skyjacker blocks are high quality ductile iron (not gray iron) tapered and are 1-piece construction with axle pins built-in.
    Vehicle Year Lift Price Item #    

    Tuff Country cast iron rear block kits are sold in pairs and include u-bolts with hardware. They are designed for vehicles with leaf springs above the rear axle.
    Vehicle Year Lift Price Item #    

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