GM Service Manual Online
For 1990-2009 cars only

Checks

Actions

A leak in the radiator

Replace a damaged radiator.

A leak in the surge tank or the hose

Replace the surge tank or the hose.

Looseness or damage of radiator hoses, heater hoses, or connections

    • Reseat the hoses.
    • Replace the hoses or the clamps.

Leaks in the coolant pump seal

Replace the coolant pump seal.

Leaks in the coolant pump gasket

Replace the coolant pump gasket.

An improper cylinder head torque

    • Tighten the cylinder head bolts to specifications.
    • Replace the cylinder head gasket, if needed.

Leaks in the intake manifold, cylinder head gasket, heater core

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