Suspension and Components› Suspension Kits

SuspensionMAXX

1.5-Inch Rear Lift Block and U-Bolt Kit

$159.99

SKU: SMX-156015

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 SMX-156015 is a heavy-duty block and U-bolt kit designed to increase rear suspension height by 1.5 inches. It is suitable for leveling vehicles, accommodating larger wheels and tires, or for hauling heavy loads. This kit features Super Heavy Duty U-bolts with a 3/4" diameter, which are larger than stock.

The kit includes solid steel blocks, heavy-duty Grade 8 U-bolts, tall nuts, and extra-thick washers. This product is 100% American-made and backed by the MAXX Structural Lifetime Warranty.
Show original supplier description
The SuspensionMAXX Heavy Duty Block and U-Bolt Kit (SMX-156015) provides a 1.5-inch rear lift, ideal for leveling your truck, fitting larger tires, or managing heavy payloads. This kit includes solid steel blocks, super heavy-duty 3/4" diameter U-bolts (larger than stock), tall nuts, and thick washers, all constructed from quality alloy metals for durability and strength. Designed for 2WD/4WD Chevrolet Silverado and GMC Sierra 2500HD models from 2011-2026 that have 3-inch wide rear leaf springs and do *not* have top mount overload springs. The installation is designed to be reversible and does not require extensive modifications, typically taking about 1.5 hours to complete with standard tools. SuspensionMAXX also provides technical support for the installation process. This kit offers a straightforward solution for restoring or increasing rear ride height, compensating for sag caused by heavy loads such as campers. The use of premium, high-strength components ensures longevity and reliable performance. It is proudly 100% American-made and comes with SuspensionMAXX's MAXX Structural Lifetime Warranty.

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-156015
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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