Mardarth Rear Leaf Spring Bracket Kit for Silverado/Sierra 1500 1999-2015 — Direct-Fit Hangars & Shackles

Mardarth 12474021 rear leaf spring bracket kit is a direct-fit replacement hangar and shackle assembly engineered to restore proper rear suspension alignment on compatible GM trucks and SUVs.

If your Silverado, Sierra 1500 or related GM vehicle shows sagging, uneven ride height, or noisy rear suspension, replacing worn leaf spring brackets and shackles often solves the issue quickly. This kit is made as a direct replacement for OE mounting points and is designed to match fitment for model years listed by the manufacturer. It’s built from durable materials and supplied as left and right hangers with shackles for both sides, which reduces installation time compared with sourcing parts individually.

Which vehicles and part numbers does this kit fit?

The kit is compatible with 1999–2015 Chevrolet Silverado and GMC Sierra 1500 models and several full-size GM SUVs and trucks from select years. It replaces original OEM hangars and shackles, matching common part numbers so you can confidently cross-reference during purchase.

• Fitment: Silverado/Sierra 1500 (1999–2015)
• Also fits: 2007–2009 Escalade, Avalanche, Suburban, Tahoe, Yukon
• Cross-references: 12474021, 722032, M22421, 338-2163

How does this bracket kit affect ride and handling?

Fresh leaf spring hangars and shackles restore the factory geometry of the rear suspension, which helps stabilize ride height and reduces irregular tire wear. While this kit doesn't alter spring rates, replacing worn brackets eliminates excessive play that causes clunking and inconsistent handling.

• Re-establishes correct spring anchor points
• Reduces lateral and vertical play in the rear axle
• Minimizes noise caused by loose or corroded mounts

What should I expect during installation?

Installation is intended to be bolt-on using existing frame holes and hardware locations; some basic tools and a jack or lift are recommended. Corroded bolts or seized fittings on older trucks may require penetrating oil, heat, or replacement fasteners. The kit is designed for a direct swap to streamline labor time for DIYers and professional shops alike.

• Direct-fit design for factory mounting points
• Left and right hangars plus shackles included
• May require removal of rusted bolts on older vehicles

What materials and warranty coverage come with the Mardarth kit?

The brackets and shackles are manufactured from robust metals chosen for load-bearing durability and resistance to everyday road exposure. Mardarth backs this kit with a one-year guarantee; contact customer service if you encounter fitment or quality issues so they can assist with a resolution.

• High-strength metal construction for sustained use
• Engineered for direct replacement and long service life
• 1-year guarantee with customer support for issues

Who is this for: This rear leaf spring bracket kit is aimed at owners and mechanics working on 1999–2015 Silverado/Sierra 1500 trucks and the listed GM SUVs who need a reliable, direct-replacement hanger and shackle solution. It suits DIY installers with moderate mechanical experience and professional shops wanting a dependable aftermarket option that restores factory suspension geometry without custom modification.