Ok, something I definitely need to resolve in my truck, and I am sure the two go hand in hand....
1. If all the windows are up, once the truck starts moving (regardless of Ac/vents on or the entire system completely off) I get a whistle in the cabin. If I crack a window, it goes away.
2. Probably same issue as #1, it I turn the AC on full blast with all windows up, it will create pressure enough that I feel it in my ears, once again, until I crack a window....
Thoughts on what to check?
I saw the cab vents mentions in this post
whistle noise with blower fan
Maybe I have an issue there, but looking for input.