Question about 2007 Chevrolet Impala LS Sedan New Cars

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When turning on the air system to bring in air from the outside there is a loud knock inside the dash on the passenger side. It goes away after about a minute. This is in a 2007 Chevy Impala

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Hello
sounds like the blend door is hanging up or is broken look under the dash toward the center of the car while someone is moving the switch you should see it move or get caught on something bent or broken make sure you check both sides if you have dual climate control
good luck
chris

Posted on Mar 12, 2011

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