HomeSteering > Power Steering Hoses, Pumps, and Related ComponentsCardone 20-59400 Power Steering Pump
Part #: 20-59400

Cardone 20-59400 Power Steering Pump

Power Steering Pump
24 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Power Steering Pump
Fitment: Cadillac, Pontiac, and Oldsmobile, DeVille, Bonneville, Seville, and Aurora
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Reliable Power Steering Pump for Cadillac, Oldsmobile, Pontiac

The Cardone Power Steering Pump 20-59400 is designed to restore smooth steering performance in select Cadillac, Oldsmobile, and Pontiac vehicles. This remanufactured pump offers a durable cast iron housing and precise fitment for models like the Aurora, Bonneville, DeVille, and Seville.

  • Remanufactured power steering pump with cast iron housing
  • Compatible with Cadillac Aurora, Oldsmobile Bonneville, Pontiac DeVille, and Seville
  • Includes hydraulic pump, instruction sheet, and sealing kit
  • Features O-ring hose port and threaded outlet attachment
  • Press-on pulley attachment type (pulley not included)
  • Power steering outlet thread size 16x1.5, inlet hose barb attachment
  • Reservoir included; remote reservoir and reservoir cap not included

About the Cardone Power Steering Pump Line

The Cardone Power Steering Pump line focuses on remanufactured components engineered to meet or exceed original equipment specifications. This product line emphasizes durability and precise fitment, ensuring reliable hydraulic pressure delivery for power steering systems. The 20-59400 pump is part of this line, providing a cost-effective replacement option with included sealing kits and installation instructions to facilitate proper setup.

Product Details and Specifications

This power steering pump features a robust cast iron housing for long-lasting performance under demanding conditions. The pump uses an O-ring type hose port and a threaded outlet attachment sized at 16x1.5, designed to connect securely with the vehicle’s power steering system. The inlet attachment is a hose barb type, and the pump includes one outlet port. The pulley attaches via a press-on method; however, the pulley itself is not included. The package contains the hydraulic pump, a sealing kit, and an instruction sheet to assist with installation. The reservoir is included with the pump, but no remote reservoir or reservoir cap is provided.

Common Applications and Problem Solving

  • Restores power assist in Cadillac Aurora, Oldsmobile Bonneville, Pontiac DeVille, and Seville models
  • Eliminates whining noises caused by air or contamination in the power steering system
  • Addresses hard steering issues, especially when assist is only present at higher engine RPMs
  • Replaces worn or damaged pumps to prevent fluid leaks and maintain hydraulic pressure
  • Helps resolve steering difficulties related to cracked or damaged pulleys (pulley replacement may be required separately)

Installation Notes and Tips

When installing the Cardone 20-59400 power steering pump, ensure the system is properly flushed to remove contamination that can cause premature pump failure. The press-on pulley attachment requires careful handling to avoid shaft damage. Since the pulley is not included, reuse the original pulley if it is in good condition or source a replacement separately. The included sealing kit should be used to prevent leaks at connection points. Check for air in the system after installation to avoid whining noises and ensure smooth steering operation.

Quality Assurance and Warranty

This remanufactured power steering pump undergoes thorough testing to meet functional standards comparable to original equipment. Cardone provides a warranty on this product to cover defects in materials and workmanship, supporting reliability and customer confidence. For specific warranty details, refer to Cardone’s official documentation.

BrandCardone
Part Number20-59400
PositionPower Steering Pump
E-WasteNo
Hose Port TypeO-Ring
Housing MaterialCast Iron
Mounting Hardware IncludedNo
Package ContentsHydraulic Pump; Instruction Sheet; Sealing Kit
Power Steering Outlet ID Size0
Power Steering Outlet Thread Size16x1.5
Power Steering Pump Inlet Attachement TypeHose Barb
Power Steering Pump Outlet Attachment TypeThreaded
Power Steering Reservoir Cap IncludedNo
Product ConditionRemanufactured
Pulley Attachement TypePress-On
Pulley IncludedNo
Remote ReservoirNo
Reservoir IncludedYes

This part fits 24 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2005CadillacDeVilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2005PontiacBonneville4.6LV8N/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2004CadillacDeVilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2004CadillacSevilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2004PontiacBonneville4.6LV8N/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2003CadillacDeVilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2003CadillacSevilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2003OldsmobileAurora4.0LV8N/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2002CadillacDeVilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2002CadillacSevilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2002OldsmobileAurora4.0LV8N/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2001CadillacDeVilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2001CadillacSevilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2001OldsmobileAurora4.0LV8N/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2000CadillacDeVilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
2000CadillacSevilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
1999CadillacDeVilleN/AReservoir Included; with DeVille Livery Package (W20); In-Line Filter available; without Aftermarket Filtration Improvement; For warranty purposes it is recommended to always install a filter and to use suggested OE Fluid and flush the system; Option Codes are on the Service Parts Identification Sticker; Power Steering Pump
1999CadillacDeVilleN/Awith Trailer Towing (V92) Package; Reservoir Included; In-Line Filter available; without Aftermarket Filtration Improvement; For warranty purposes it is recommended to always install a filter and to use suggested OE Fluid and flush the system; Option Codes are on the Service Parts Identification Sticker; Power Steering Pump
1999CadillacDeVilleN/Awith Hearse Conversion Package (B9Q); Reservoir Included; In-Line Filter available; without Aftermarket Filtration Improvement; For warranty purposes it is recommended to always install a filter and to use suggested OE Fluid and flush the system; Option Codes are on the Service Parts Identification Sticker; Power Steering Pump
1999CadillacSevilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump
1998CadillacDeVilleN/AReservoir Included; with DeVille Livery Package (W20); In-Line Filter available; without Aftermarket Filtration Improvement; For warranty purposes it is recommended to always install a filter and to use suggested OE Fluid and flush the system; Option Codes are on the Service Parts Identification Sticker; Power Steering Pump
1998CadillacDeVilleN/Awith Trailer Towing (V92) Package; Reservoir Included; In-Line Filter available; without Aftermarket Filtration Improvement; For warranty purposes it is recommended to always install a filter and to use suggested OE Fluid and flush the system; Option Codes are on the Service Parts Identification Sticker; Power Steering Pump
1998CadillacDeVilleN/Awith Hearse Conversion Package (B9Q); Reservoir Included; In-Line Filter available; without Aftermarket Filtration Improvement; For warranty purposes it is recommended to always install a filter and to use suggested OE Fluid and flush the system; Option Codes are on the Service Parts Identification Sticker; Power Steering Pump
1998CadillacSevilleN/AReservoir included, optional filter, OE fluid recommended, system flush required for warranty.; Power Steering Pump

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

260015942607331188955485

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.