Suspension and Components› Suspension Kits

SuspensionMAXX

Heavy Duty Rear Block and U-Bolt Kit

$199.99

SKU: SMX-156720

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 2-inch lift kit designed for 2011-2026 Chevrolet/GMC Silverado/Sierra 2500-3500HD models. This kit features larger than stock, 3/4-inch diameter Super Heavy Duty U-bolts. It is designed for vehicles with top-mounted overload springs and 3-inch wide leaf springs.
Show original supplier description
The SuspensionMAXX Heavy Duty Rear Block and U-Bolt Kit provides a 2-inch rear lift, ideal for leveling your vehicle, accommodating larger wheels and tires, or enhancing its capacity for hauling heavy loads. This kit is specifically engineered for 2011-2026 Chevrolet/GMC Silverado/Sierra 2500-3500HD trucks equipped with top-mounted overload springs and 3-inch wide leaf springs. It utilizes larger-than-stock, 3/4-inch diameter Super Heavy Duty U-bolts for increased strength and durability. The design emphasizes ease of installation, requiring no extensive modifications and being fully reversible, allowing your vehicle to be returned to stock specifications. Installation is estimated to take approximately 1.5 hours. This kit is 100% American-made and backed by the MAXX Structural Lifetime Warranty. Please note that this kit is not compatible with 2020-2026 DRW (Dual Rear Wheel) models. The applications covered include 2011-2026 Chevrolet/GMC Silverado/Sierra 3500HD (4x4 and 2WD) and 2024-2026 Chevrolet/GMC Silverado/Sierra 2500HD models with top-mounted overload springs.

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-156720
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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