Cardone 20-55859 Power Steering Pump

Remanufactured Power Steering Pump for OE Fit

Cardone 20-55859 is a remanufactured power steering pump built to meet or exceed original equipment performance. It is engineered for direct replacement use on select Buick, Chevrolet, Oldsmobile, and Pontiac applications, including Buick Regal, Chevrolet Impala, Chevrolet Monte Carlo, and Pontiac Grand Prix models.

This Cardone Power Steering Pump line focuses on restoring hydraulic steering performance with tested internal components, updated seals, and verified pressure control. The included reservoir and sealing kit support a clean replacement on vehicles that use an integrated reservoir design.

Key Features

• Remanufactured Original Equipment-style power steering pump for direct fitment
• All critical components, including cam packs and spool valves, are triple-tested
• 100% new O-rings and premium-grade HNBR seals help resist leaks and heat-related breakdown
• Computer-tested final assembly checks pressure, bypass, fluid flow, valve operation, steering effort, and noise
• Precision-surfaced shafts help reduce premature seal wear
• Supplied with a tested and calibrated pressure relief valve
• Cast iron housing with O-ring hose port and threaded outlet connection

Detailed Description

Cardone 20-55859 is a remanufactured power steering pump designed for vehicles that require a reservoir-included hydraulic pump assembly. The unit is built from an original equipment core and reconditioned to restore proper steering assist, fluid control, and operating noise characteristics. For shoppers searching for a power steering pump for 1997-2004 Buick Regal, 2000-2003 Chevrolet Impala, or 1997-2003 Pontiac Grand Prix, this part number provides a direct replacement path with OE-style fitment.

The remanufacturing process includes inspection and improvement of the original design where applicable, along with hydraulic efficiency testing to verify reliable operation. Cardone 20-55859 also cross-references Buick 26050488 and 26086103, plus Chevrolet 26050488, for the same application.

Common Problems This Pump Can Address

• Whining or noisy power steering pump operation
• Loss of steering assist at idle or low engine speed
• Hard steering caused by pump wear or internal leakage
• Fluid bypass or pressure control issues
• Leaks related to worn seals or degraded pump components

Installation Notes and Fitment

• Fits 1997-2004 Buick Regal, N/A; reservoir included, optional filter, OE fluid recommended, system flush required for warranty.
• Fits 2000-2003 Chevrolet Impala, N/A; reservoir included, optional filter, OE fluid recommended, system flush required for warranty.
• Fits 1998-2003 Chevrolet Monte Carlo, N/A; reservoir included, optional filter, OE fluid recommended, system flush required for warranty.
• Fits 1997-2003 Pontiac Grand Prix, N/A; reservoir included, optional filter, OE fluid recommended, system flush required for warranty.
• Fits 1998-1999 Chevrolet Lumina, N/A; reservoir included, optional filter, OE fluid recommended, system flush required for warranty.
• Fits 1998-1999 Oldsmobile Intrigue, N/A; reservoir included, optional filter, OE fluid recommended, system flush required for warranty.
• Fits 1996 Buick Regal, N/A; non-variable effort steering (N40) with included reservoir; in-line filter available; system flushing and OE fluid use recommended for warranty purposes.

Before installation, inspect the steering system for contamination, air in the lines, and fluid condition. A whining pump is often caused by trapped air, so the system should be bled thoroughly after service. If the original pulley has a loose fit on the replacement shaft, the pulley must be replaced. If steering assist is present only at higher engine rpm, check for contamination in the flow control valve bore and flush the system.

Quality Assurance

Cardone remanufactured power steering pumps are tested for hydraulic efficiency and verified for pressure, flow, valve operation, steering effort, and noise before release. The remanufacturing process also reduces energy and raw material use compared with producing a new part.