Dorman - HELP Engine Coolant Reservoir Cap for 2005-99 Cadillac, 2003-01 Oldsmobile, 2005-04 Pontiac 54221

Engine Coolant Reservoir Cap for 2005-99 Cadillac, 2003-01 Oldsmobile, 2005-04 Pontiac

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

Key Features

• Engine Coolant Reservoir Cap
• Direct replacement for original cap
• Part Number 54221
• Dimensions 3.5in x 3.0in x 3.0in, weight 0.3lbs
• Includes 1 PC

Benefits

• Quickly restores cooling system integrity
• Prevents overheating and engine damage
• Easy to install without tools
• Saves money compared to dealership parts

Application

This cap is ideal for owners of 2005-99 Cadillac, 2003-01 Oldsmobile, and 2005-04 Pontiac who need a reliable replacement after cracking or loss.

Fitment Notes

• Fits 2005-99 Cadillac, 2003-01 Oldsmobile, 2005-04 Pontiac

Why Choose Dorman - HELP?

• 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

• Includes 1 PC

Item Dimensions

• 3.5in x 3.0in x 3.0in, 0.3lbs