Dorman 82589 Power Steering Reservoir Cap

Power Steering Reservoir Cap Replacement

Dorman 82589 is a direct replacement power steering reservoir cap for vehicles that need a cracked, worn, or missing original cap restored. It helps seal the reservoir to reduce fluid loss and limit contamination in the steering system. This cap is a practical OE-style service part for Buick Century, Chevrolet Malibu, and Pontiac Grand Am applications.

Key Features

• Direct replacement for the original power steering reservoir cap
• Black screw-on design for a secure reservoir seal
• Built with metal, plastic, and rubber materials
• Includes a dipstick for fluid level checking
• Measures 1.65 in. in diameter and 2.058 in. in height
• Compatible with reservoirs using a 2 inch stem
• Part number 82589 for easy identification

Detailed Description

This Dorman power steering reservoir cap is made for service replacement on a wide range of GM vehicles, including Chevrolet Cavalier, Chevrolet Impala, Pontiac Sunfire, Oldsmobile Alero, and Buick Rendezvous. The screw-on construction helps maintain a tight fit on the reservoir, while the integrated dipstick supports routine fluid checks during maintenance. If the original cap is damaged or missing, Dorman 82589 restores the reservoir closure needed to help keep steering fluid contained and the system cleaner.

This part cross-references 26000901 for the same application.

What It Helps Solve

• Cracked or broken power steering reservoir cap
• Missing cap that leaves the reservoir open to contamination
• Fluid seepage from a poor sealing cap
• Difficulty checking power steering fluid level
• Replacement needs on GM steering reservoir service jobs

Installation Notes and Tips

Verify reservoir stem style and cap diameter before installation. This cap is specified for reservoirs with a 2 inch stem and a 1.65 inch diameter cap opening. Clean the reservoir neck before threading the cap on, and confirm the cap seats fully to help maintain a proper seal. For fitment, this part is listed for 1987-2007 applications across Buick, Chevrolet, Pontiac, Oldsmobile, and Cadillac models, including Buick Century, Chevrolet Malibu, and Pontiac Grand Am.

• Fits 2002-2007 Buick Rendezvous, N/A
• Fits 1997-2006 Chevrolet Malibu, N/A
• Fits 1989-2005 Buick Century, N/A
• Fits 2002-2005 Chevrolet Cavalier, N/A
• Fits 1987-1994 Chevrolet Cavalier, N/A
• Fits 2000-2005 Chevrolet Impala, N/A
• Fits 1995-2005 Chevrolet Monte Carlo, N/A
• Fits 2001-2005 Pontiac Aztek, N/A
• Fits 1994-2005 Pontiac Grand Am, N/A
• Fits 1987-1991 Pontiac Grand Am, N/A
• Fits 1999-2005 Pontiac Montana, N/A
• Fits 2002-2005 Pontiac Sunfire, N/A
• Fits 1999-2004 Oldsmobile Alero, N/A
• Fits 1996-2004 Oldsmobile Silhouette, N/A
• Fits 1990-1994 Oldsmobile Silhouette, N/A
• Fits 1993-2002 Chevrolet Camaro, N/A
• Fits 1993-2002 Pontiac Firebird, N/A
• Fits 1995-2001 Chevrolet Lumina, N/A
• Fits 1992-2001 Pontiac Grand Prix, N/A
• Fits 1997-1999 Oldsmobile Cutlass, N/A
• Fits 1994-1998 Buick Skylark, N/A
• Fits 1987-1991 Buick Skylark, N/A
• Fits 1994-1998 Oldsmobile Achieva, N/A
• Fits 1990-1998 Pontiac Trans Sport, N/A
• Fits 1993-1997 Oldsmobile Cutlass Supreme, N/A
• Fits 1994-1996 Buick Regal, N/A
• Fits 1987-1996 Chevrolet Corsica, N/A
• Fits 1990-1996 Chevrolet Lumina APV, N/A
• Fits 1992-1996 Oldsmobile Cutlass Ciera, N/A
• Fits 1991-1994 Pontiac Sunbird, N/A
• Fits 1988-1991 Oldsmobile Cutlass Calais, N/A
• Fits 1987-1988 Cadillac Cimarron, N/A
• Fits 1987 Oldsmobile Calais, N/A
• Fits 1987 Oldsmobile Firenza, N/A

Quality Assurance

Dorman is known for replacement hardware and service parts that match original equipment needs for repair work. Part 82589 is built as a direct-fit replacement for the listed reservoir applications and is intended to restore proper cap function on compatible GM steering systems.