Mardarth Rear Leaf Spring Bracket Kit for Silverado/Sierra 1500 (1999–2015) — Direct-Fit Hangers & Shackles, Steel

Mardarth 12474021 rear leaf spring bracket kit is a direct-fit replacement hangers and shackles designed to restore proper rear suspension alignment and load support on 1999–2015 Silverado and Sierra 1500 trucks.

If your truck shows sagging at the rear, uneven tire wear, or noises from the leaf spring area, worn or damaged leaf spring hangers and shackles are often the cause. This kit replaces OEM part numbers 12474021, 722032, M22421, and 338-2163 with durable components built to match factory fit and function. It’s offered with a one-year guarantee and engineered for a straightforward swap using standard tools.

How will this kit affect ride stability and rear alignment?

Replacing bent or worn hangers and shackles returns the leaf spring mounting geometry to specification, which helps the axle track correctly under load and during cornering. Improved alignment reduces abnormal tire wear and restores predictable handling.

• Restores factory spring mounting points for correct axle location
• Minimizes lateral and fore-aft axle movement
• Reduces unusual tire wear and steering pull caused by shifted suspension

Is this the correct kit for my vehicle model and year?

This Mardarth bracket kit is compatible with Chevrolet Silverado and GMC Sierra 1500 models from 1999 through 2015, and fits several full-size GM SUVs and trucks that use the same suspension parts. Always compare your vehicle’s current part number or mounting pattern to the listed replacements before ordering.

• Fits 1999–2015 Silverado & Sierra 1500
• Also compatible with select 2007–2009 Escalade, Avalanche, Suburban, Tahoe, Yukon models
• Replaces OEM numbers 12474021, 722032, M22421, 338-2163

What should I expect during installation and maintenance?

The kit is a direct replacement designed for bolt-on installation using common garage tools; no major frame modifications are required. Expect to remove the old hanger and shackle, clean the mounting area, and torque the new hardware to factory specifications. After installation, inspect fasteners and bushings periodically and re-torque as recommended.

• Direct-fit parts for faster, less complicated installation
• Use proper torque values and anti-seize where specified
• Periodic inspections help prolong service life and safety

What materials and warranty coverage come with the kit?

Mardarth manufactures the hangers and shackles from high-quality steel with corrosion-resistant finishes to withstand road conditions and load cycles. The kit includes a one-year guarantee; contact customer service for assistance if you experience defects or fitment issues.

• Durable steel construction with protective coating
• Tested for safety and performance to meet replacement standards
• 1-year guarantee backed by Mardarth customer support

Who is this for: This rear leaf spring bracket kit is intended for Silverado and Sierra 1500 owners, fleet managers, and DIY mechanics who need a dependable, direct-fit replacement for worn or damaged rear spring hangers and shackles. It’s well suited for trucks used in hauling, towing, or daily driving where restored suspension geometry and reliability are priorities.