Why is my car making a loud knocking sound on the passenger side of the vechicle ?

Asked by Sep 27, 2012 at 05:47 AM about the 2008 Chevrolet Impala LTZ

Question type: Maintenance & Repair

It happens but is not limited to when I unlock the doors or I turn power
to on it only lasts about a minute or so. I also heard it happening when I
was just standing near the car without doing anything to it I didn't even
have the keys

1 Answer

7,835

could be the heat shield contracting / expanding

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