Dorman Front Rack and Pinion Mount Bushing for Chevy/GMC Silverado Sierra 1999-2007 — Direct Replacement, Durable Fit

The Dorman 523-266 front rack and pinion mount bushing is a precision-engineered replacement designed to restore secure steering rack mounting on compatible Chevrolet and GMC trucks.

This replacement bushing is built to match the original part’s fit and performance for a range of Chevy Silverado and GMC Sierra 1500/1500 HD models from 1999 through 2007. Dorman engineers reverse‑engineer the original component, then manufacture and test the new bushing to meet strict fit, finish, and durability expectations. Before ordering, confirm exact fitment by entering your vehicle’s make, model and trim level into the garage tool.

How does this bushing restore steering feel and stability?

By replacing a worn or damaged mount bushing, the steering rack is held in its intended position, reducing play and improving steering response. The part reestablishes the connection between the rack and the vehicle frame to limit unnecessary movement under load.

• Reverse‑engineered to replicate original mounting geometry
• Precision dimensions ensure proper steering alignment retention
• Durable material resists premature deformation under road stress

Which vehicles and model years does this part fit?

This Dorman bushing fits specific model years of Chevrolet Silverado and GMC Sierra trucks. Fitment covers multiple trims for both 1500 and 1500 HD configurations produced between 1999 and 2007, but compatibility varies by year and trim.

• Chevrolet Silverado 1500: 1999–2006 (various trims) and 2007 Classic
• Chevrolet Silverado 1500 HD: 2001–2003, 2005–2006
• GMC Sierra 1500: 1999–2006 and 2007 Classic; GMC Sierra 1500 HD: 2001–2003, 2005–2006
• Always verify with the garage tool before purchase

What are the construction and quality characteristics to expect?

This bushing is manufactured to Dorman’s quality standards with materials chosen for longevity and consistent performance. Each unit undergoes testing and inspection to help ensure it meets the dimensional and functional aspects of the original equipment part.

• Sturdily constructed to resist wear and environmental exposure
• Tested for dimensional accuracy and fit reliability
• Designed for a direct replacement installation with no modification

How easy is the installation and what should I check during replacement?

Installation is intended to be a direct swap for the factory bushing, but the job typically requires basic mechanical tools and safe jacking/support of the vehicle. Inspect surrounding mounts and hardware for corrosion or wear and replace fasteners as needed to ensure a secure assembly.

• Direct replacement — no special fabrication required
• Recommend checking steering rack alignment and mounting hardware torque
• Use the garage tool to confirm part matches your exact vehicle trim

Who is this for: This Dorman 523-266 front rack and pinion mount bushing is intended for owners, mechanics, and restoration specialists working on Chevrolet Silverado or GMC Sierra 1500/1500 HD trucks from the listed years who need a reliable OEM‑style replacement. Choose this part if you want a reverse‑engineered component built to match original fit and function and backed by Dorman’s quality control, and be sure to verify fitment with your vehicle details before purchase.