I've got a 2007 GT Coupe with about 8500 miles and over the last few months it's developed an annoying little noise from the dash near the base of the windshield. It's a subtle pulsating wind or air pressure noise. I'm wondering if it's coming from the defroster vents, like there's something flapping around down there or not sealing. It occurs on the highway at say 60 to 80 miles per hour and can only be heard with the windows up. The weird thing is, if the windows are open and then closed it takes a half a minute or so until the noise occurs, like a pressure buildup causes it. Anyone have any ideas or experience with this sort of problem?
I could see this being annoying in a more civilized V6, but the GT...I kinda beg for it!!!!! It gives it "character".