I purchased a 2010 Impala in Oct. 2012 with less then 19,000 miles on it.
When I am driving down the road with the window down and air button circulating air from outside there is a whistle from the passenger side.
If you turn the fan on it stops.
If you have the button circulating the air inside the car there is no whistle with the window down and fan off.
I have been told now that all the Impala's do this.
I don't believe this is true.
Why would you manufacture a car that when you drive it you can't enjoy due to whistle.
I am fed up with the run around from the dealership.
I had a 2004 Impala and my friend has 2009 Impala and they don't have the whistle