Suspension and Components› Suspension Kits

SuspensionMAXX

Heavy Duty 1-Inch Rear Block and U-Bolt Kit

$149.99

SKU: SMX-152010

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The SuspensionMAXX Heavy Duty Rear Block and U-Bolt Kit is a 1-inch block lift designed to level your vehicle or increase ground clearance. It is constructed from strong, durable steel blocks and high-strength U-bolts and fasteners. This kit is made in America and covered by the MAXX Structural Lifetime Warranty.
Show original supplier description
The SuspensionMAXX Heavy Duty Rear Block and U-Bolt Kit is engineered to provide a 1-inch rear lift, ideal for leveling your truck, accommodating larger wheels and tires, or enhancing its hauling capacity. Installation is straightforward and can typically be completed in about 1.5 hours using standard tools, with comprehensive support available through the SuspensionMAXX Technical Support Program. The kit includes all necessary hardware, such as CNC drilled blocks, Grade 8 U-bolts, tall nuts, and extra-thick washers. The SuspensionMAXX SMX-152010 kit is specifically designed for 1988-2000 Chevrolet/GMC Silverado/Sierra K2500 4x4 and K3500 4x4 models, as well as 1988-1999 Chevrolet/GMC Suburban 2500 4x4 vehicles. A critical fitment requirement is the presence of 5/8 inch diameter U-bolts on your vehicle's rear axle. It is also noted that this kit fits the "Old Body" style trucks within these model years.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSuspensionMAXX
Part NumberSMX-152010
CategorySuspension and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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