Heavy Duty Rear Block and U-Bolt Kit 1" for 2011-2021 Silverado/Sierra 3500 2WD/4x4 w/ 3" Wide Leaf Springs. Features 3/4" diameter larger than stock Super Heavy Duty U bolts. For vehicles with top mounted overload springs.
*Note: 2020-2021 Models Not compatible with DRW.
Ideal for leveling or lifting vehicles, adding larger wheels and tires, or hauling heavy loads
Available in a variety of lift heights to provide the “just right” amount of rear lift for your needs
SuspensionMAXX provides application coverage for the most vehicles and the largest number of height and configuration options per vehicle
Strong and durable – Steel blocks, high strength u-bolts and fasteners
Require no extensive modifications to the vehicle – totally reversible
Excellent SuspensionMAXX customer service and technical support
100% American Made and covered by the MAXX Structural Lifetime Warranty
- 2011-2021 Chevrolet/GMC Silverado/Sierra 3500 4x4 and 2wd
The SuspensionMAXX SMX-156710 Heavy Duty Block and U-Bolt Rear Leaf Spring Leveling Kit increases rear suspension height by 1 inch, and is ideal for increasing ground clearance or fitting larger wheels and tires. Fits 2011-2021 Chevrolet/GMC Silverado/Sierra 3500 4x4 and 2wd vehicles with top mounted overload springs. Block and U-Bolt kits can also be used to level vehicles that carry heavy loads. SuspensionMAXX Heavy Duty Block and U-Bolt Kits are made with quality alloy metals for high strength and long life – they won’t crack or compress.
The Super Heavy Duty U-Bolts are larger than stock and measure 3/4" in diameter. SuspensionMAXX includes all hardware needed and components are quickly installed using job specific tools. Installation involves no major alterations to the vehicle and the truck or SUV can easily be put back to stock specifications. Made in America and covered under the MAXX Structural Lifetime Warranty.
SuspensionMAXX Heavy Duty Block and U-Bolt Rear Leaf Spring Leveling Kits are the perfect solution for lifting or leveling the rear of trucks or SUV’s carrying heavy loads including campers. Such loads can cause rear suspension to compress and sag - thereby reducing rear ride height. Our Block and U-Bolt Kits simply fit between rear leaf springs and axle to compensate for suspension compression and restore rear ride height.
SuspensionMAXX Heavy Duty Block and U-Bolt Rear Leaf Spring Leveling Kits utilize premium quality high strength components including CNC drilled and located solid steel blocks, heavy-duty Grade 8 U-Bolts, tall nuts and extra thick washers. Installation can be done in about 1.5 hours and is supported by SuspensionMAXX Technical Support Program.
|Fits 2011-2021 Silverado/Sierra 3500 2WD/4x4 w/ 3" Wide Leaf Springs. Features 3/4" diameter larger than stock Super Heavy Duty U bolts. For vehicles with top-mounted overload springs. *Not compatible with 2020-2021 DRW|
|1.0" Lift Height|
No, this is not necessary on blocks less than 3” in height. No change in pinion angle is required for 1-2.5” of lift.
Suspension MAXX block and U-bolt kits use high-quality blocks from SOLID STEEL, unlike the cheaply made hollow cast import lift blocks. Each of our blocks is precision cut and CNC machined. We also use All- American made steel U-bolts, Tall Nuts, and Heavy Duty washers.
Factory shocks have 8-12” of shock travel and can work well with 1” and 1.5” of lift on most trucks. 2” of lift is the maximum height of lift we recommend; it depends on the application as some vehicles like F150 trucks have extremely long shocks from the factory. Shock extensions or longer shocks will be needed for sharp drop-offs, like speed bumps, for example.
Ask a Question
If you wish to return your SuspensionMAXX product please contact us by phone or email. Fill out the Return Form Bellow and mail it back with your return. You must notify us within 90 days of receiving your shipment. Non-warranty returns are subject to a 15% restocking fee, and all shipping charges are nonrefundable. Items must be in new condition (No Exceptions), any cosmetic wear or damage from improper packaging in return shipping will increase the restocking fee to 25%. You are responsible for the return shipping cost and insurance fee (if desired). Our staff will inspect returned products, and issue credit promptly. No returns after 90 days from date of delivery. If you have ordered the wrong item by mistake, we do offer exchanges at no additional charge within 90 days.
1692 Marquette Ave
Bay City, MI 48706