Dorman Engine Coolant Reservoir Pressurized with Quality Materials for 1999-2006 Chevrolet 2004-1999 Oldsmobile 2005-1999 Pontiac 603-109

Engine coolant reservoir for 1999-2006 Chevrolet, 2004-1999 Oldsmobile, and 2005-1999 Pontiac that replaces the factory part with a pressurized design.

Built to meet the manufacturer’s design intent for reliable service.

Key Features

• Manufactured from quality materials to withstand underhood heat and engine vibration
• Engineered to match the fit and function of the original part
• Pressurized coolant reservoir design
• Trusted by 100 years of automotive aftermarket experience

Benefits

• Durable construction ensures long-lasting performance
• Reliable pressurization prevents coolant leaks and overheating
• Direct-fit replacement simplifies installation
• Reduces risk of repeat repairs with proven quality

Application

This part is ideal for owners of Chevrolet, Oldsmobile, or Pontiac vehicles from the specified years who need a reliable replacement for a failing coolant reservoir.

Fitment Notes

• 1999-2006 Chevrolet
• 2004-1999 Oldsmobile
• 2005-1999 Pontiac

Why Choose Dorman - OE Solutions?

• Choosing Dorman aftermarket replacement parts is a smart way to restore your vehicle with confidence, thanks to a strong focus on fit, durability, and dependable performance. Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function, helping ensure a smoother installation and reliable results. Built with quality materials and validated through testing, they’re made to stand up to daily driving demands and help reduce the risk of repeat repairs. For a long-lasting fix you can trust, Dorman delivers proven aftermarket solutions that keep your vehicle operating the way it should.

What’s in the Box

• 1 PC

Item Dimensions

• 16.0in x 6.9in x 6.9in, 2.4lbs