Last post on Sep 14, 2012 at 5:35 PM
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Chevrolet Impala, Sedan
#19 of 20 Re: Knocking noise under dash [robert220]
Sep 13, 2012 (10:30 pm)
My 2006 does it, but it has gotten worse. Now it won't stop unless i turn the car off and it takes about 5 minutes before it does stop. And only HOT air blows out of my driver's side vents.
#20 of 20 Re: Knocking noise under dash [luckygirl7133]
Sep 14, 2012 (5:35 pm)
Good evening luckygirl7133,
We're sorry to hear that you're having some troubles with your HVAC system; what are your plans for getting this looked into?
Sarah, GM Customer Service