• ACDelco Professional Radiator Caps Primary Image
  • ACDelco Professional Radiator Caps Alternate Image 1


  • Fit most models of GM vehicles on the road today
  • Seal and pressurize your vehicle’s cooling system as the radiator transfers heat from the engine’s coolant to the outside air
  • Professional, premium aftermarket replacement radiator cap
  • Provides the performance and dependability you expect from ACDelco
  • Manufactured to meet expectations for fit, form, and function


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An ACDelco Professional, premium aftermarket Standard Type Radiator Cap is the ideal high quality replacement for your GM vehicle. It seals and pressurizes your vehicle’s cooling system as the radiator transfers heat from the engine’s coolant to the outside air. These premium aftermarket replacement components are manufactured to meet your expectations for fit, form, and function.


24 Month/Unlimited Mile Limited Warranty*: Our most common Parts Warranty offers coverage on the majority of our Genuine GM Parts and ACDelco service replacement parts. Effective on parts purchased April 1, 2018 and later to the original retail purchaser. Contact seller for limited warranty part details, qualifications, and possible labor coverage.

Learn more about ACDelco warranties:


Do I need to replace the radiator cap after changing or flushing the coolant in my vehicle?
Yes, always use the correct radiator cap for your application. When changing or flushing your coolant, a new radiator cap or thermostat should be considered.

Could a damaged radiator pressure cap cause damage to my vehicle?

Yes, a damaged radiator pressure cap could cause your engine to overheat.

Could a missing radiator cap cause coolant leakage?

Yes, and these leaks could lead to overheating and engine damage.


Maintain proper coolant levels and check level monthly (Note: Never attempt to remove a radiator cap while the engine is hot. Serious injury could result).

• Replace coolant with a mixture of antifreeze and water according to the vehicle manufacturer's recommendations.
• Inspect engine belts for cracks or missing sections; check belt tension.
• Evaluate radiator and radiator cap for leaks, corrosion, or a worn cap gasket.
• Examine hoses every 12 months. Look for leaks, cracks or rot. Replace when showing signs of wear.
• Tighten any loose clamps. Always replace clamps when replacing hoses.
• Have cooling system inspected immediately if instrument panel-mounted temperature
gauge indicates engine overheating.
• Periodically, remove bugs, leaves and other debris from the front of the radiator. They can block airflow and substantially reduce cooling efficiency.




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