Direct-fit OE upgrade rear shock for 1988–1999 Chevrolet K1500 and 1988–1998 GMC K1500 trucks at stock height. 46mm monotube nitrogen gas design. Bar pin upper / eyelet lower mount. Includes Z71 and extended cab models. Made in the USA.
The Bilstein 24-020435 B6 4600 Series Rear Shock Absorber is a direct-fit OE upgrade engineered for the classic GMT400 platform — the 1988–1999 Chevrolet K1500 and 1988–1998 GMC K1500. Whether your truck is a daily driver, weekend trail rig, work truck, or Z71 off-road package model, the 4600 series delivers a meaningful improvement over worn factory rear shocks without any lift or modification required.
Precisely valved for the K1500 at stock ride height, the 46mm monotube design gives you better rear axle control under load, more settled highway composure, and improved traction on rough terrain — all the things that make a worn-out rear end feel new again. It's the most cost-effective upgrade you can make to restore or improve the rear suspension performance of your GMT400 truck.
Bar pin upper / eyelet lower — direct bolt-on rear replacement at stock height using OEM mounting hardware
Fade-free rear damping under towing and off-road loads — cooler and more consistent than twin-tube alternatives
Application-specific valving for the K1500 platform — controlled and stable on pavement, capable on trails
Designed, engineered, and manufactured in the USA. Backed by Bilstein's limited lifetime warranty
Hardware Not Included: Mounting hardware is not included — this shock uses your existing OEM hardware. Sold Individually: One shock absorber per package. Order qty 2 for a complete rear axle replacement. Stock Height Only: The B6 4600 Series is for stock-height applications. For lifted K1500 trucks, see the Bilstein B8 5100 series. Year Difference Between Chevy and GMC: Chevrolet K1500 fitment runs through 1999; GMC K1500 fitment runs through 1998. Verify your specific year and brand before ordering.
In The Box (Qty: 1 Shock Absorber): • Bilstein 24-020435 Rear Shock Absorber • Blue Protective Boot • Black Rubber Bushings NOT Included: • Mounting Hardware (uses existing OEM hardware) • Dust Shield • Second shock (sold individually — order qty 2 for a complete rear pair)
24-104050 — Front B6 4600 shock for 1988–1999 Chevrolet K1500 / 1988–1998 GMC K1500 (pairs with this rear shock) Replacing front and rear shocks together delivers the most balanced improvement in ride quality, handling, and overall truck composure.
Bilstein Official Product Page Bilstein Technical Support: Website: www.bilstein.com Warranty: Limited Lifetime for original purchaser — B6 4600 series gas pressure shocks. Proof of purchase required. See full terms at Bilstein's website.
The 24-020435 fits the following vehicles at stock ride height. Covers standard cab, extended cab, and Z71 package models. Sold individually — order two for a complete rear replacement. Note the Chevrolet fitment runs one year longer than GMC.
⚠️ Fitment cross-referenced across Amazon, ShockWarehouse, Pure Diesel Power, and Suspension Lifts. Chevrolet K1500 runs 1988–1999; GMC K1500 runs 1988–1998. Always verify your specific year and model before ordering.