GM Service Manual Online
For 1990-2009 cars only

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Check for a leak in the radiator.

Replace a damaged radiator.

Check for a leak in the following locations:

    • The surge tank
    • The hose

Replace the following parts, as needed:

    • The surge tank
    • The hose

Check for loose or damaged radiator hoses, heater hoses, and connections.

Reseat the hoses.

Replace the hoses or the clamps.

Check for leaks in the coolant pump seal.

Replace the coolant pump seal.

Check for leaks in the coolant pump gasket.

Replace the coolant pump gasket.

Check for an improper cylinder head torque.

Tighten the cylinder head bolts to specifications.

Replace the cylinder head gasket, if needed.

Check for leaks in the following locations:

    • The intake manifold
    • The cylinder head gasket
    • The cylinder block plug
    • The heater core
    • The radiator drain plug

Repair or replace any components, as needed, to correct the leak.