When I have my AC on in my 2010 Chevy Impala, there's a thumping noise. Its not a clicking noise. This noise only occurs when the AC is on. There's no noise at all when the AC is in the off position, or the fans/heat is running. The noise is also only heard at low speeds or at idle. What could the cause of this be?
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Tuesday, July 24th, 2012 AT 3:53 AM