Car is overheating and fans not working?

2009 CHEVROLET IMPALA
104,000 MILES • 3.9L • 6 CYL • 2WD • AUTOMATIC
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TODD ANDREWS
  • MEMBER
  • 2 POSTS
The car is overheating and the fans are not working. Replaced temp sensor and fan relays. Could it be bad thermostat?
Aug 12, 2022 at 8:02 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Yes, it could when the engine is overheating do you hear a thumping noise? This is a sure sign the thermostat is stuck closed. Here are two generic guides to help with the thermostat location and how to change it out in the diagrams below:

https://www.2carpros.com/articles/engine-overheating-or-running-hot

and

https://www.2carpros.com/articles/replace-thermostat

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Professional Diagram for 2CarPros Members
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Aug 13, 2022 at 9:51 AM
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Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.