Gdydi rear bump stop kit for Silverado/Sierra 1500 (1999–2021) — Gmrck15s 4.75" rubber helper springs, 8600 lb capacity

Built to fit Chevy Silverado 1500 and GMC Sierra 1500 models from 1999 through 2021, this Gmrck15s kit replaces the original jounce bumpers with a hollow rubber spring that cushions impacts and improves load handling. Rated for an 8600-pound capacity and measuring 4.75 inches in height, the kit is supplied with hardware for a direct fit and backed by a one-year warranty.

How does this kit protect my truck’s rear suspension?

The Gmrck15s helper spring uses a hollow rubber-damper design that compresses under extreme travel, dissipating energy before metal components contact each other. That reduces stress on shocks and mounting points when you hit potholes, haul heavy cargo, or drive off-road.

• Hollow rubber spring reduces harsh bottoming and rebound shocks
• Rated load capacity: 8600 pounds for improved support
• Helps extend the life of shocks and suspension bushings by absorbing impacts

Will these bump stops fit my Silverado or Sierra?

This kit is manufactured as a direct replacement for OE part number Gmrck15s and is compatible with Chevrolet Silverado 1500 and GMC Sierra 1500 model years 1999–2021. Always confirm your vehicle’s OEM component number before ordering to ensure fitment.

• Compatibility: 1999–2021 Silverado 1500 and Sierra 1500
• Direct replacement for OE Gmrck15s design and dimensions
• Includes bolts, nuts, and washers for straightforward installation

What is included and how do I install the kit?

The package contains two rubber bump stops plus the fastening hardware required for the axle mounts. Installation is typically bolt-on using existing suspension brackets; basic hand tools are all that’s required for most vehicles.

• Contents: 2 bump stops, 2 washers, 2 fastening bolts and nuts
• Kit height: 4.75 inches for proper engagement under load
• Simple bolt-on installation—no special tools or fabrication needed

What kind of durability and warranty does Gdydi provide?

The Gmrck15s kit is made from reinforced rubber compounds that resist repeated compression and environmental wear. Gdydi backs the product with a 12-month warranty to cover manufacturing defects and ensure a reliable, worry-free replacement.

• Material: improved rubber formulation for long-term use
• Warranty: 12 months against defects
• 100% brand new parts designed to meet factory-style performance

Who this is for: The Gdydi Gmrck15s rear bump stop kit is aimed at Silverado and Sierra owners who tow, carry heavy payloads, drive over rough roads, or want to protect aging rear suspension components. If you need a straightforward, vehicle-specific helper spring that restores rear-end support, reduces harsh bottoming, and installs without modification, this kit is a practical upgrade.