Mardarth Rear Leaf Spring Bracket Kit for Silverado/Sierra 1500 (1999–2015) — Direct-fit OE geometry, Heavy-duty

Mardarth's 12474021 rear leaf spring bracket kit is a direct-fit replacement hanger and shackle set engineered to restore proper rear suspension alignment on 1999–2015 Silverado and Sierra 1500 trucks.

If your truck's rear leaf spring mounts are worn, cracked, or bent, this bracket kit provides a straightforward way to renew the suspension connection points without custom fabrication. The kit is manufactured from durable materials to match OE mounting geometry and includes parts that replace 12474021, 722032, M22421, and 338-2163. It fits a broad range of GM models from 1999 through 2015, including select Escalade, Avalanche, Suburban, Tahoe, and Yukon applications noted for compatibility between 2007–2009.

How will this bracket kit affect my truck's rear suspension performance?

Installing the Mardarth bracket kit re-establishes the original mounting locations and movement of the leaf springs, which helps maintain proper ride height and handling balance. It reduces unwanted play at the connection point and keeps suspension components aligned under load.

• Direct-replacement hangers and shackles that match factory geometry for predictable handling
• High-strength materials resist bending and wear under towing or hauling
• Reduces noise and movement caused by degraded mounts
• Restores correct spring positioning to improve tire contact and stability

Will this kit fit my Silverado/Sierra 1500 or other GM trucks?

The kit is designed for 1999–2015 Chevrolet Silverado and GMC Sierra 1500 models and lists cross-compatibility with specific GM full-size SUVs from 2007–2009. Check your vehicle's year and part interchange numbers to confirm a match before purchasing.

• Direct replacement for part numbers 12474021, 722032, M22421, 338-2163
• Fits 1999–2015 Silverado and Sierra 1500 pickup trucks
• Compatible with 2007–2009 Escalade, Avalanche, Suburban, Tahoe, Yukon where applicable
• Designed to follow factory mounting points—minimal modifications expected

What does installation involve, and can I do it myself?

Installation is intended to be straightforward because the parts are direct replacements that align with factory holes and mounting surfaces. Basic mechanical skills and common tools are usually enough, though rusted bolts or weld-on applications may require cutting, penetrating oil, or professional assistance.

• Direct-fit components save time versus custom-fabricated hangers
• Typical tools: socket set, torque wrench, penetrating oil, jack and stands
• May require bolt removal or minor rust cleanup on older vehicles
• If welding or frame repair is needed, consult a professional installer

What warranty and support come with the Mardarth bracket kit?

The kit includes a 1-year guarantee and Mardarth customer support for fitment or quality questions. If you encounter a defect or installation issue within the warranty period, reach out for assistance and replacement guidance.

• 1-year guarantee covering manufacturing defects
• Customer service available to help resolve fitment or quality concerns
• Replacement item guidance if parts arrive damaged or non-conforming

Who is this for: This bracket kit is suited to owners of 1999–2015 Chevrolet Silverado and GMC Sierra 1500 trucks—and those with the compatible GM SUVs—who need a practical, cost-effective repair to restore rear leaf spring mounting integrity. It’s ideal for DIY mechanics with basic tools, fleet maintenance shops replacing worn hangers at service intervals, and anyone preparing a truck for safe towing or resumed heavy use.