HomeSteering > Power Steering Hoses, Pumps, and Related ComponentsDorman 603-851 Power Steering Reservoir
Part #: 603-851

Dorman 603-851 Power Steering Reservoir

⚙️ 108 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet and GMC, Express 1500, Express 2500, Express 3500, Savana 1500, Savana 2500, and Savana 3500
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Reliable Power Steering Reservoir for Chevrolet and GMC Vans

The Dorman 603-851 power steering reservoir is designed for remote mounting and built to meet the demands of Chevrolet Express and GMC Savana vans. Constructed from durable metal with a matte black finish, this reservoir ensures long-lasting performance and corrosion resistance.

  • Durable metal construction with matte black finish
  • Includes mounting bracket and reservoir cap with dipstick
  • Remote mounted design for flexible installation
  • Compatible with Chevrolet Express 1500, 2500, 3500 and GMC Savana 1500, 2500, 3500
  • Part number 603-851 for precise fitment

Product Details and Features

This power steering reservoir by Dorman is engineered specifically for power steering systems requiring a remote mounted reservoir. The metal material provides strength and resistance to wear, while the matte black finish offers a professional appearance and helps prevent surface corrosion. The included mounting bracket simplifies installation by providing a secure attachment point. The reservoir cap comes with a dipstick, allowing for easy fluid level checks and maintenance. Note that fittings and mounting hardware are not included, so ensure compatibility with your existing system components.

Compatible Vehicles and Applications

This power steering reservoir is compatible with the following vehicles:

  • Chevrolet Express 1500, 2500, 3500
  • GMC Savana 1500, 2500, 3500

Designed to replace worn or damaged reservoirs in these models, part number 603-851 helps maintain proper power steering fluid levels and system performance.

Common Issues Addressed by This Reservoir

  • Leaking or cracked power steering reservoir
  • Low power steering fluid levels causing steering difficulty
  • Contaminated or degraded reservoir affecting fluid quality
  • Damaged or missing reservoir cap and dipstick
  • Corrosion or wear on original reservoir housing

Installation Notes and Tips

When installing the Dorman 603-851 power steering reservoir, ensure the mounting bracket is securely fastened to prevent movement during vehicle operation. Since fittings and installation hardware are not included, reuse existing components or source compatible parts separately. Check the reservoir cap and dipstick for proper sealing to avoid fluid leaks. Always verify fluid levels after installation and bleed the power steering system if necessary to remove air pockets.

Quality Assurance and Warranty

Dorman power steering reservoirs are manufactured to meet or exceed OEM specifications, providing reliable performance for Chevrolet Express and GMC Savana vehicles. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts. Consult product documentation or the manufacturer for exact warranty terms.

BrandDorman
Part Number603-851
MaterialMetal
ColorBlack
FinishMatte
Mounting Hardware IncludedNo
Mounting Bracket IncludedYes
Fittings IncludedNo
Cap IncludedYes
Remote MountedYes
Installation Hardware IncludedNo
Package Contents1 power steering reservoir; 1 cap; 1 dipstick
Reservoir Cap IncludedYes
Reservoir TypePower steering

This part fits 108 vehicles. Search below:

YearMakeModelPositionNotes
2023ChevroletExpress 2500N/Awo/Level Sight
2023ChevroletExpress 3500N/Awo/Level Sight
2023GMCSavana 2500N/Awo/Level Sight
2023GMCSavana 3500N/Awo/Level Sight
2022ChevroletExpress 2500N/Awo/Level Sight
2022ChevroletExpress 3500N/Awo/Level Sight
2022GMCSavana 2500N/Awo/Level Sight
2022GMCSavana 3500N/Awo/Level Sight
2021ChevroletExpress 2500N/Awo/Level Sight
2021ChevroletExpress 3500N/Awo/Level Sight
2021GMCSavana 2500N/Awo/Level Sight
2021GMCSavana 3500N/Awo/Level Sight
2020ChevroletExpress 2500N/Awo/Level Sight
2020ChevroletExpress 3500N/Awo/Level Sight
2020GMCSavana 2500N/Awo/Level Sight
2020GMCSavana 3500N/Awo/Level Sight
2019ChevroletExpress 2500N/Awo/Level Sight
2019ChevroletExpress 3500N/Awo/Level Sight
2019GMCSavana 2500N/Awo/Level Sight
2019GMCSavana 3500N/Awo/Level Sight
2018ChevroletExpress 2500N/Awo/Level Sight
2018ChevroletExpress 3500N/Awo/Level Sight
2018GMCSavana 2500N/Awo/Level Sight
2018GMCSavana 3500N/Awo/Level Sight
2017ChevroletExpress 2500N/Awo/Level Sight
2017ChevroletExpress 3500N/Awo/Level Sight
2017GMCSavana 2500N/Awo/Level Sight
2017GMCSavana 3500N/Awo/Level Sight
2016ChevroletExpress 2500N/Awo/Level Sight
2016ChevroletExpress 3500N/Awo/Level Sight
2016GMCSavana 2500N/Awo/Level Sight
2016GMCSavana 3500N/Awo/Level Sight
2015ChevroletExpress 2500N/Awo/Level Sight
2015ChevroletExpress 3500N/Awo/Level Sight
2015GMCSavana 2500N/Awo/Level Sight
2015GMCSavana 3500N/Awo/Level Sight
2014ChevroletExpress 1500N/Awo/Level Sight
2014ChevroletExpress 2500N/Awo/Level Sight
2014ChevroletExpress 3500N/Awo/Level Sight
2014GMCSavana 1500N/Awo/Level Sight
2014GMCSavana 2500N/Awo/Level Sight
2014GMCSavana 3500N/Awo/Level Sight
2013ChevroletExpress 1500N/A
2013ChevroletExpress 2500N/A
2013ChevroletExpress 3500N/A
2013GMCSavana 1500N/A
2013GMCSavana 2500N/A
2013GMCSavana 3500N/A
2012ChevroletExpress 1500N/A
2012ChevroletExpress 2500N/A
2012ChevroletExpress 3500N/A
2012GMCSavana 1500N/A
2012GMCSavana 2500N/A
2012GMCSavana 3500N/A
2011ChevroletExpress 1500N/A
2011ChevroletExpress 2500N/A
2011ChevroletExpress 3500N/A
2011GMCSavana 1500N/A
2011GMCSavana 2500N/A
2011GMCSavana 3500N/A
2010ChevroletExpress 1500N/A
2010ChevroletExpress 2500N/A
2010ChevroletExpress 3500N/A
2010GMCSavana 1500N/A
2010GMCSavana 2500N/A
2010GMCSavana 3500N/A
2009ChevroletExpress 1500N/A
2009ChevroletExpress 2500N/A
2009ChevroletExpress 3500N/A
2009GMCSavana 1500N/A
2009GMCSavana 2500N/A
2009GMCSavana 3500N/A
2008ChevroletExpress 1500N/A
2008ChevroletExpress 2500N/A
2008ChevroletExpress 3500N/A
2008GMCSavana 1500N/A
2008GMCSavana 2500N/A
2008GMCSavana 3500N/A
2007ChevroletExpress 1500N/ARemote Mounted Reservoir
2007ChevroletExpress 2500N/ARemote Mounted Reservoir
2007ChevroletExpress 3500N/ARemote Mounted Reservoir
2007GMCSavana 1500N/ARemote Mounted Reservoir
2007GMCSavana 2500N/ARemote Mounted Reservoir
2007GMCSavana 3500N/ARemote Mounted Reservoir
2006ChevroletExpress 1500N/ARemote Mounted Reservoir
2006ChevroletExpress 2500N/ARemote Mounted Reservoir
2006ChevroletExpress 3500N/ARemote Mounted Reservoir
2006GMCSavana 1500N/ARemote Mounted Reservoir
2006GMCSavana 2500N/ARemote Mounted Reservoir
2006GMCSavana 3500N/ARemote Mounted Reservoir
2005ChevroletExpress 1500N/ARemote Mounted Reservoir
2005ChevroletExpress 2500N/ARemote Mounted Reservoir
2005ChevroletExpress 3500N/ARemote Mounted Reservoir
2005GMCSavana 1500N/ARemote Mounted Reservoir
2005GMCSavana 2500N/ARemote Mounted Reservoir
2005GMCSavana 3500N/ARemote Mounted Reservoir
2004ChevroletExpress 1500N/ARemote Mounted Reservoir
2004ChevroletExpress 2500N/ARemote Mounted Reservoir
2004ChevroletExpress 3500N/ARemote Mounted Reservoir
2004GMCSavana 1500N/ARemote Mounted Reservoir
2004GMCSavana 2500N/ARemote Mounted Reservoir
2004GMCSavana 3500N/ARemote Mounted Reservoir
2003ChevroletExpress 1500N/ARemote Mounted Reservoir
2003ChevroletExpress 2500N/ARemote Mounted Reservoir
2003ChevroletExpress 3500N/ARemote Mounted Reservoir
2003GMCSavana 1500N/ARemote Mounted Reservoir
2003GMCSavana 2500N/ARemote Mounted Reservoir
2003GMCSavana 3500N/ARemote Mounted Reservoir

* 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:

25736885

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