There's an annoying rattle/buzz that sounds like it's coming from behind the dash, above the glove box in my 2005 Dakota. Seems to start around 55-60.mph, and stays steady at or above that.

I've checked for loose items under the hood and around the glove box, but no help.

Any ideas?

 

No idea. Something in the passenger airbag. When i put my hand on it, it goes away.