Hi All, I have the same tea pot/whistle noise, however, when I duplicate the issue it only happens when any window or the sunroof open is open slightly or more. I can faintly hear it when the A/C is on full max and the radio off too. My guess is when the cab is under pressure a seal "blows out" so to speak. The noise is louder than having the window down. I'm thinking maybe the cab vents in between the cab and box are causing it. It is a 2020 Crew Cab Laramie built 3/2020. I have not taken it in yet however I might pull the back seat and see what happens.
Yes the seal is present between the cab and box.
Yes the seal is present between the cab and box.