Weird howling noise under dash?

[jeangreyfan]

Have you figured out what was causing this? My 2007 Base does it when all the windows and sunroof are closed but stops when I open the sunroof to the first click. Starts around 60mph and goes to 80mph...it's really annoying and the radio doesn't cover the noise...

[Blown 346]

My 07 GT does the same thing. My wife and I just bought the car and just noticed the noise yesterday. I am too tryijng to figure out what theis is caused by.