I have looked in other threads but can't find one like this. It's a whistling whirling sound that is totally air pressure related. Turn fan off or crack a window and it goes away. Is there a pressure relief valve for the interior?
Just throwing this out there.. do you have side steps? my truck was whistling and it turned out the paint on my side steps was peeling and coming off, causing a whistle which sounded like it was a door seal or something.
Yes I do have side steps but did not change antenna. Neither is it though as will whistle when in park so not wind road noise. Anybody know if there is a pressure relief valve? Makes the most sense to me if there is and it is plugged.