Suspension and Components› Suspension Kits

SuspensionMAXX

Heavy Duty Block and U-Bolt Kit 1.5 Inch Rear Lift

$189.99

SKU: SMX-156715

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 Block and U-Bolt kit is a rear lift component designed to increase suspension height by 1.5 inches. This kit is compatible with 2WD and 4WD Chevy Silverado and GMC Sierra 3500 models that feature top-mounted overload springs. It can also be utilized to level vehicles that frequently carry heavy loads.
Show original supplier description
The SuspensionMAXX Heavy Duty Block and U-Bolt kit (SMX-156715) provides a 1.5-inch rear lift for compatible Silverado and Sierra 3500 trucks. Specifically designed for 2WD/4WD models equipped with top-mounted overload springs, this kit can effectively raise the rear suspension. The lift type is a block, a common and effective method for achieving moderate lift heights. This kit is confirmed to fit the 2011-2026 Chevrolet Silverado and GMC Sierra 2500-3500 models. While the SMX-156715 specifically targets the 3500 models with top overload springs, other SuspensionMAXX products like the SMX-GM715M are noted for fitting a broader range of GM trucks including 4x4 and 2WD Silverados, Sierras, Avalanches, Tahoes, Yukons, Suburbans, and Escalades, typically for front-end lift applications.

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-156715
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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