If when I start my truck and someone gets in from the passenger side, when the pass door is open I can hear this air noise. Its pretty easy to hear, not sure what it is, but it sounds like its coming from the passenger side, and it only does it when the passenger door is open. Anybody know anything about this?

 

The airbox is on the passenger side.
I don't know about the K&N filters but with the Amsoil you can hear the air coming through the intake even when the passenger door is closed. Sounds like white noise/radio static on low volume.

First time I heard it I tracked it down to coming from behind the glove box until I realized what it was :pat:

 

Thanks, I think I will go check that out now.

 

If you have a K&N intake or an Amsoil then that would be it or you could have a loose vacuum hose, maybe?