Bilstein 24-186575 B6 Series Rear Shock Absorber for 2001–2010 Duramax/GM HD trucks

Upgrade the ride and control of your 2001–2010 Chevrolet Silverado or GMC Sierra 2500HD (and select 1500HD/2500 models) with the Bilstein 24-186575 B6 Series monotube shock absorber. Specifically tuned as a Camper Special application for vehicles running overhead campers or heavy rear loads, this rear shock delivers fade-free damping, improved stability, and a more comfortable, controlled ride over stock.

Why the Bilstein B6?

Bilstein’s B6 (4600 Series) uses a high-pressure monotube design with a velocity-sensitive digressive piston. This setup reacts instantly to changing road conditions and load, providing consistent performance whether you’re empty, loaded with a camper, or towing. The larger 46 mm body improves heat dissipation so the shock maintains damping force longer than conventional twin-tube units, reducing fade on rough roads or during extended highway travel.

Key benefits include better body control, reduced sway, improved lane-change stability, and a noticeable upgrade in both comfort and handling—without changing ride height.

Features

• Monotube gas-pressure design for consistent, fade-free performance
• Application-specific tuning for Camper Special / overhead camper use
• Velocity-sensitive digressive piston
• Zinc yellow paint finish with blue straight dust boot
• Direct bolt-on replacement (uses existing hardware when serviceable)
• Sold individually (two required per vehicle)

Specifications

• Part Number: 24-186575
• Series: B6 (4600)
• Position: Rear
• Internal Design: Monotube
• Collapsed Length: 16.24 in (412.5 mm)
• Extended Length: 26.02 in (661.0 mm)
• Upper Mount: Eye 14.4 mm
• Lower Mount: Eye 14.1 mm
• Boot: Blue straight (included)
• Finish: Yellow paint
• Quantity Needed: 2 per vehicle
• Warranty: Limited Lifetime

Fitment

Fits the following (rear position; confirm specific notes for your truck):

• 2001–2003 & 2005–2006 Chevrolet Silverado 1500 HD
• 1999–2004 Chevrolet Silverado 2500
• 2001–2010 Chevrolet Silverado 2500 HD (including 2007 Classic)
• Matching GMC Sierra 1500 HD / 2500 / 2500 HD models

Important notes: Designed for use with overhead truck campers. Not for vehicles equipped with ZX3 electronic suspension or Quadrasteer. Stock-height application.

The Bilstein 24-186575 is a proven upgrade for Duramax owners who want better rear control under load without a full suspension overhaul. Direct-fit, high-quality construction, and backed by Bilstein’s Limited Lifetime Warranty.