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.

    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 #    
    Pickup 1 Ton 4WD (except Crew Cab, Dually)
    1973-87 3.5"
    $103.60
    BUK3584 SK More Info
    Pickup 1/2T, 3/4T 4WD
    1973-87 3.5"
    $103.60
    BUK3588 SK More Info
    Pickup 1 Ton 4WD (except Crew Cab, Dually)
    1973-87 4.5"
    $113.16
    BUK4584 SK More Info
    Pickup 1/2T, 3/4T 4WD
    1973-87 4.5"
    $113.16
    BUK4589 SK More Info
    Pickup 1/2T, 3/4T 4WD
    1973-87 5.5"
    $116.70
    BUK5589 SK More Info
    Pickup 3/4 Ton 8-Lug 4WD
    1973-87 5.5"
    $116.70
    BUK5592 SK More Info
    Pickup 1 Ton Crew Cab 4WD (except Dually)
    1973-91 3.5"
    $103.60
    BUK3584 SK More Info
    Pickup 1 Ton Crew Cab 4WD (except Dually)
    1992-98 3.5"
    $103.60
    BUK3584 SK More Info

    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 #    
    Pickup 1/2 or 3/4 ton 4WD
    1969-72 5.5"
    $104.46
    97002 TC More Info
    Pickup 1/2 ton 4WD
    1973-87 5.5"
    $106.97
    97007 TC More Info
    Pickup 3/4 ton 4WD
    1973-87 5.5"
    $104.82
    97011 TC More Info

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