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Professional Radiator Cap | ACDelco

With a full range of part numbers to fit most GM vehicles, ACDelco Professional Radiator Caps offer customers an ideal
replacement for their worn OE part. Built to our demanding specifications, ACDelco Professional Radiator Caps give you our
legendary quality at a competitive price.


  • Standard Type Radiator Cap:
    • Wide range available to fit most vehicles on the road.
  • Safety Release Radiator Cap:
    • Lets you release the pressure prior to taking off the cap.


Find out more about ACDelco Professional Radiator Caps and how they fit into the Cooling System with the product facts below.


The radiator transfers heat from the engine’s coolant to the outside air while the radiator cap seals and pressurizes the cooling system.

Service and Maintenance:

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, worn cap gasket.
  • Examine hoses every 12 months. Look for leaks, cracks or rot. Replace when showing signs of wear.
  • Tighten any loose clamps. 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.

Limited Warranty:

12 Months/12,000 Miles*

*Whichever comes first. To the original retail purchaser. Parts only; installation not included. See your local retailer or Independent Service Center that offers ACDelco parts for details.

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