ACDelco 13565087 Radiator Surge Tank Cap Assembly

The ACDelco 13565087 is a GM OE (Original Equipment) radiator surge tank cap assembly designed to maintain proper pressure within the engine cooling system. This cap seals the surge tank, regulates coolant system pressure, and allows excess pressure to vent safely — helping protect hoses, the radiator, and other cooling components from damage due to over-pressurization.

Key Features:

• Direct OE replacement for GM vehicles — engineered to factory specifications
• Maintains correct cooling system pressure for optimal engine operating temperature
• Pressure-relief valve vents excess pressure to prevent hose and component damage
• Durable construction for long service life under high-heat, high-pressure conditions
• Easy drop-in installation with no modifications required

ACDelco is General Motors' genuine OE parts brand, ensuring this surge tank cap meets the exact standards of the original component. The part number 13565087 is cross-referenced as a GM OEM part. Always confirm fitment using your vehicle's year, make, model, and engine configuration before installation.