Fuel Knock/Combustion Noise
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for obvious overheating problems. Refer to Engine Overheating .
- Inspect for a low engine coolant level.
- Inspect for any restricted air flow through the radiator. Refer to Radiator Cleaning .
- Inspect for a malfunctioning or incorrect thermostat.
- Inspect for a correct coolant solution. The solution should be a 50/50 mix of anti-freeze and water.