GM Service Manual Online
For 1990-2009 cars only

Possible Cause

Correction

Loss of coolant

Check the following areas for possible leakage:

    • Hoses
    • Coolant pump
    • Heater core
    • Thermostat housing
    • Radiator
    • Core plugs
    • Head gaskets
    • Intake manifold gaskets

Pressure check the system and cap. Ensure the correct cap is being used.