This genuine GM replacement 1997-2004 C5 Radiator Surge Tank Inlet Hose features the correct molded bends for a no-hassle installation. Known by many names, coolant expansion tanks, surge tank or overflow tank, this system provides extra storage for your radiators coolant. With this system working properly, your radiator will always stay filled since coolant isn’t lost.
In order to have this system properly function, the system needs vacuum to pull back any overflow as your engine cools down. If your expansion tanks hoses are bad, brittle or broken, you are losing coolant and your cooling system is suffering.
GM Genuine Parts