ACDelco RC74 Radiator Cap - GM Original Equipment

The ACDelco RC74 is a GM Original Equipment radiator cap designed to maintain optimal cooling system performance in your GM vehicle. This spring-loaded cap seals the radiator filler neck or coolant surge tank, preserving system pressure while the engine operates and raising the boiling point of the engine coolant to prevent overheating.

Key Features:

• Spring-loaded pressure valve maintains proper cooling system pressure
• Raises coolant boiling point to prevent engine overheating
• Vacuum valve replenishes coolant from expansion tank during engine cool-down
• GM Original Equipment quality for precise fit and reliable performance
• Direct replacement for your vehicle's factory radiator cap
• Engineered to meet GM's strict durability and performance standards

This radiator cap is manufactured to GM's original specifications, ensuring the same performance and service life as the component that came with your vehicle from the factory. The pressure relief and vacuum functions work together to protect your cooling system from damage caused by excessive pressure or vacuum conditions.