ReadyLift GM OEM Style 2-Inch Rear Lift Block Kit for Chevy Silverado 3500 HD and GMC Sierra 3500 HD (Part #66-3122)

ReadyLift GM OEM Style 2-Inch Rear Lift Block Kit for Chevy Silverado 3500 HD and GMC Sierra 3500 HD (Part #66-3122)

Brand: ReadyLIFT
Regular price$176.99
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Built for the ReadyLift GM OEM Style 2-Inch Rear Lift Block Kit for Chevy Silverado 3500 HD and GMC Sierra 3500 HD (Part #66-3122), this ReadyLIFT component delivers rugged durability, precise fitment, and trail-ready performance. Engineered for serious off-road use while maintaining everyday drivability.

ReadyLIFT OEM style rear block kits are available for the 2011-2026 GM 2600 HD single rear wheel pickups with the factory Trailer Package rear springs. These Rear Block Kits include two (2) 2" Rear Blocks, four (4) E-Coated U-Bolts, eight (8) Nuts and Washers and will safely lift the rear of your 2011-2026 2WD and 4WD 8-lug Single Rear Wheel GM trucks with trailer package springs 2".   NOTE:   This kit is not compatible with trucks equipped with top-mounted overload springs. Based on OEM designs and never made out of light weight extrusions our 2" GM Blocks are made from cast iron just like the factory blocks, ensuring maximum strength and reliability. ReadyLIFT Block Kits will put a slight rake back in your Truck for hauling or towing and are designed to work with your ReadyLIFT Suspension Leveling Kit. Like all ReadyLIFT products these block kits come with our Lifetime Warranty. NOTE: For Use Only on 2600HD trucks that have the factory Trailer Package rear springs.    This kit is not compatible with trucks equipped with top-mounted overload springs.

Upgrade your 2012-2016 GM 3500 HD or Sierra 3500 HD truck with the ReadyLift OEM Style 2-Inch Rear Lift Block Kit, part number 66-3122. Designed specifically for trucks equipped with the factory Trailer Package rear springs, this kit provides a reliable and safe way to lift the rear of your vehicle, enhancing its stance and towing capabilities. Crafted from cast iron, these 2-inch blocks match OEM specifications, ensuring maximum strength, durability, and compatibility with your vehicle. The kit includes two cast iron rear lift blocks, four E-coated U-bolts, and eight nuts and washers, making installation straightforward for professional installers. This lift kit is ideal for restoring a slight rake after leveling or for adding a subtle lift to improve load handling and aesthetics. It is not compatible with trucks equipped with top-mounted overload springs, so please verify your vehicle's rear spring configuration before purchase. As with all ReadyLIFT products, this kit is backed by a lifetime warranty, providing peace of mind and quality assurance. Designed for direct fitment, the installation requires professional expertise and approximately two hours to complete. Proper installation ensures your vehicle maintains safety and performance standards while gaining the benefits of a slight rear lift. This product complies with California Proposition 65 warnings due to potential chemical exposure during manufacturing, specifically Di(2-ethylhexyl)phthalate (DEHP).

Whether you’re looking to improve your truck’s appearance, enhance towing capabilities, or restore factory rake after leveling, the ReadyLift GM OEM Style Rear Block Kit offers a dependable solution. It is compatible with a range of Chevrolet Silverado and GMC Sierra 3500 HD models from 2012 through 2016, ensuring a perfect fit for your heavy-duty truck. The kit's robust cast iron construction guarantees maximum strength and longevity, making it suitable for demanding hauling and towing tasks. Installation involves replacing the factory blocks with these durable upgrades, which are engineered to work seamlessly with your existing suspension components. Overall, this lift block kit combines strength, reliability, and ease of installation — making it a smart investment for any serious truck owner looking to optimize their vehicle's performance and appearance.

Features:

  • Engineered for 2012-2016 GM 3500 HD trucks with factory Trailer Package rear springs
  • Includes two 2-inch cast iron rear lift blocks for durability and strength
  • Supplied with four E-coated U-bolts, nuts, and washers for secure installation
  • Designed to restore or add a slight rake for improved towing and load handling
  • Compatible with 2WD and 4WD models with 8-lug single rear wheel configurations
  • Requires professional installation, approximately 2 hours
  • Backed by Lifetime Warranty for quality assurance
  • Not compatible with trucks equipped with top-mounted overload springs
  • Made from OEM-style cast iron, matching factory specifications

Fitment:
Chevrolet Silverado 2500 HD 2020
Chevrolet Silverado 2500 HD 2021
Chevrolet Silverado 2500 HD 2022
Chevrolet Silverado 2500 HD 2023
Chevrolet Silverado 2500 HD 2024
Chevrolet Silverado 3500 HD 2007
Chevrolet Silverado 3500 HD 2008
Chevrolet Silverado 3500 HD 2009
Chevrolet Silverado 3500 HD 2010
Chevrolet Silverado 3500 HD 2011
Chevrolet Silverado 3500 HD 2012
Chevrolet Silverado 3500 HD 2013
Chevrolet Silverado 3500 HD 2014
Chevrolet Silverado 3500 HD 2015
Chevrolet Silverado 3500 HD 2016
Chevrolet Silverado 3500 HD 2017
Chevrolet Silverado 3500 HD 2018
Chevrolet Silverado 3500 HD 2019
Chevrolet Silverado 3500 HD 2020
Chevrolet Silverado 3500 HD 2021
Chevrolet Silverado 3500 HD 2022
Chevrolet Silverado 3500 HD 2023
Chevrolet Silverado 3500 HD 2024
Chevrolet Silverado 3500 HD 2025
GMC Sierra 2500 HD 2020
GMC Sierra 2500 HD 2021
GMC Sierra 2500 HD 2022
GMC Sierra 2500 HD 2023
GMC Sierra 2500 HD 2024
GMC Sierra 3500 HD 2011
GMC Sierra 3500 HD 2012
GMC Sierra 3500 HD 2013
GMC Sierra 3500 HD 2014
GMC Sierra 3500 HD 2015
GMC Sierra 3500 HD 2016
GMC Sierra 3500 HD 2017
GMC Sierra 3500 HD 2018
GMC Sierra 3500 HD 2019
GMC Sierra 3500 HD 2020
GMC Sierra 3500 HD 2021
GMC Sierra 3500 HD 2022
GMC Sierra 3500 HD 2023
GMC Sierra 3500 HD 2024

Currently, we do not have an installation guide available for this product. Please contact support for assistance.

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