Preliminary Diagnosis
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Verify that overheating is not caused by the following conditions:
- While pulling a trailer that is within the recommended towing weight.
- After prolonged idle in gear, with the A/C system operating.
- After prolonged driving in slow city traffic, traffic jams, parades, etc.
- Verify that the cooling system is properly filled. Refer to Draining and Filling Cooling System .
- If the complaint is a low temperature gauge reading, check the temperature gauge for proper operation. Connect a Scan Tool to the vehicle and read the system temperature.
- Compare this reading to the temperature gauge.
- Replace the gauge or switch if necessary.
- If the complaint is no heat from the HVAC system, refer to HEATING PERFORMANCE DIAGNOSTIC .
- Verify the proper operation of the thermostat. Refer to Thermostat Diagnosis .
If these conditions can be eliminated as the cause of overheating, refer to the table below.