Centric 603.66003 Suspension Knuckle Bushing - Rear Lower or Rear Upper

Centric Rear Knuckle Bushing for Select GM Vehicles

Centric Premium Steering & Suspension Components part 603.66003 is a suspension knuckle bushing for select rear upper and rear lower applications. It is built for specific Buick, Chevrolet, Cadillac, Pontiac, Saturn, and Oldsmobile fitments, including Buick Rendezvous, Pontiac Aztek, and Cadillac DeVille applications.

Key Features

• Centric Premium Steering & Suspension Components product line
• Suspension knuckle bushing for rear upper and rear lower positions
• Advanced synthetic compound construction
• Resists heat and harsh environmental exposure
• Application-specific fitment for import and domestic vehicles
• Part number 603.66003 for catalog lookup and ordering

Product Details

Centric 603.66003 is a suspension knuckle bushing engineered for rear suspension service on a range of GM vehicles. The Centric Premium Steering & Suspension Components line focuses on replacement steering and suspension parts made with synthetic materials selected to handle heat and demanding road conditions while maintaining consistent performance over time. This part number 603.66003 is listed for rear upper and rear lower positions, depending on the vehicle application.

Compatible fitments include 2002-2006 Buick Rendezvous, rear upper; 2005-2006 Buick Terraza, rear upper; 2005-2006 Chevrolet Uplander, rear upper; 2006 Pontiac Montana, rear upper; 2002-2004 Pontiac Montana, rear upper; 2005-2006 Saturn Relay, rear upper; 2001-2005 Pontiac Aztek, rear upper; 2005 Pontiac Montana, rear upper; 2002-2004 Oldsmobile Silhouette, rear upper; 1993-2002 Cadillac Eldorado, rear lower; 1994-1999 Cadillac DeVille, rear lower; 1993-1997 Cadillac Seville, rear lower; and 1993 Cadillac Allante, rear lower.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear suspension looseness at the knuckle
• Clunking or knocking from worn bushings
• Excessive rear suspension movement
• Uneven handling feel caused by deteriorated bushing material
• Noise and vibration from aged suspension components

Installation Notes and Tips

Verify the vehicle position before ordering, since this part is listed for both rear upper and rear lower applications. Confirm the exact model year and suspension configuration, including IRS notes where shown in the fitment data, before installation. Compare the original bushing dimensions and mounting location to ensure the correct application for your Buick Rendezvous, Pontiac Aztek, Cadillac DeVille, or other listed vehicle.

Quality Assurance

Centric Premium Steering & Suspension Components uses advanced synthetic compounds selected to resist heat and environmental stress while supporting long service life in steering and suspension service.