Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle OFF, inspect the cooling system for the conditions below. Refer to Symptoms - Engine Cooling .
- Weak coolant solution
- Obstructed radiator air flow or bent radiator fins
- Blocked cooling system passages
- Radiator hoses that are restricted, collapsed, or deteriorated
- Damaged water pump and or belt
- Loss of cooling system pressure
  - Leaking surge tank cap
  - Radiator hoses
- Cylinder head or an engine block that is cracked or plugged
- If a condition was found
  Repair as necessary.
- If a condition was not found
Replace the Engine Coolant Thermostat.