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Low coolant Cooling fan not working Bad thermostat Plugged or dirty radiator collapsing hoses defective radiator cap (common problem for this vehicle) system airbound water pump not working to full capacity Or, most likely, the catalytic converter has failed and clogged the exhaust and caused the intake manifold to melt. Chevy issued a letter in 2005 to this effect. I believe the letter stated that Chevy would replace the catalytic converter at no charge if the car is less than 10 years old or has less than 110,000 miles. Call your Chevy dealer ASAP and have it replaced. Unfortunately, from my experience, Chevy will not pay for all the damage caused by this catalytic converter design flaw. So you'll most likely be stuck with the repair costs for the damage caused by the melted intake manifold.

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Q: Your 2001 impala is overheating what is your problem?
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