AUTOKAY Rear Frame Leaf Spring Bump Stop Pair for Chevrolet/GMC Silverado Sierra 1500 (1999-2007) — Molded Rubber, OE Fit

AUTOKAY 523-049 / 15712438 rear frame leaf spring bump stop: a direct-fit rubber bumper pair engineered to restore proper axle travel limits on compatible Chevrolet and GMC pickup rear frames.

If your Silverado or Sierra is exhibiting harsh bottoming, clunking over bumps, or uneven rear suspension travel, worn bump stops can be the source. These AUTOKAY replacement rear axle bumpers come as a pair and match OE fitment for specific Chevrolet Silverado 1500, Silverado 1500 Classic, Silverado 1500 HD models and GMC Sierra 1500, Sierra 1500 Classic, Sierra 1500 HD models from model years listed below. They are molded rubber components designed to absorb impact and keep axle-to-frame contact controlled when the suspension reaches full compression.

Which trucks and model years will this bump stop fit?

This part replaces OEM numbers 15712438 and 523-049 and is intended for rear frame installation on select Silverado and Sierra models. Confirm compatibility by cross-checking your truck’s model year and whether it’s a 1500 or HD/Classic variant.

• Chevrolet Silverado 1500: 1999–2006; Silverado 1500 Classic: 2007
• Chevrolet Silverado 1500 HD: 2001–2003, 2005–2006; HD Classic: 2007
• GMC Sierra 1500: 1999–2006; Sierra 1500 Classic: 2007
• GMC Sierra 1500 HD: 2001–2003, 2005–2006; HD Classic: 2007

How does replacing worn bump stops help my suspension?

New rear frame bump stops restore the designed cushion at full compression, reducing metal-to-metal contact and harsh impacts at the end of travel. That results in smoother rides over big bumps, less stress on leaf springs and mounting hardware, and a quieter rear end during heavy loads.

• Absorbs impact when suspension bottoms out
• Prevents premature wear on springs and shackles
• Reduces banging and rattling from axle-to-frame contact

What’s included and how are these bump stops installed?

The package contains one pair of rear axle rubber bumpers ready for rear frame installation. Installation is generally straightforward: raise and secure the vehicle, locate the original bump stops on the rear frame near the leaf springs, remove the worn pieces, then press or bolt the new units into place depending on your truck’s mounting style.

• Includes: 1 pair rear axle rubber bumpers
• Tools: basic hand tools, jack stands, possible lubricant for ease of fit
• Time: typically 30–60 minutes for an experienced DIYer

Are these bump stops an exact OEM match and what are the materials?

These AUTOKAY bump stops are manufactured to match the fit and function of OEM part numbers 15712438 and 523-049. They are molded rubber pieces designed for durability and to provide the same stopping characteristics as factory parts without altering suspension geometry.

• Replacement for OEM 15712438, 523-049
• Molded rubber construction for impact absorption
• Engineered for direct fit to specified rear frame locations

Who is this for: This product is aimed at owners and mechanics of Chevrolet Silverado and GMC Sierra trucks from the listed years who need a cost-effective repair to return rear suspension travel control to factory-like performance. Ideal for trucks used for towing, hauling, or those showing signs of worn bump stops—this pair provides a direct-fit replacement to quiet rear-end impacts and protect suspension components.