Dorman Engine Coolant Reservoir Non-Pressurized for 1993-1999 Buick Cadillac Oldsmobile Pontiac 603-103

Engine coolant reservoir for 1993-1999 Buick, Cadillac, Oldsmobile, Pontiac non-pressurized replacement part from Dorman.

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.
• Non-Pressurized design suitable for specified models.
• Backed by 100 years of automotive aftermarket experience.

Benefits

• Provides reliable cooling system performance without pressure complications.
• Easy to install as a direct-fit replacement.
• Durable construction resists heat and vibration for long life.
• Reduces risk of coolant leaks and overheating issues.

Application

This part is ideal for owners of 1993-1999 Buick, Cadillac, Oldsmobile, and Pontiac vehicles needing a replacement coolant reservoir due to wear or failure.

Fitment Notes

• Buick 1999-1991
• Cadillac 1993-1991
• Oldsmobile 1999-1991
• Pontiac 1999-1992

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

• Included items not specified by the manufacturer.

Item Dimensions

• 14.8in x 7.8in x 10.5in, 1.9lbs