I only have 700 miles on the the car (2010 Journey Sedan w/premium) and its already making all kinds of interior noise... When I go over bumps the rear deck vibrates and rattles...The passenger door also makes buzzing sounds when bass hits or on talk radio. Driving me crazy. I took it in to the dealer for the door buzz... they said its some amp in the the door thats making it...and they are ordering the part. I doubt thats the problem but well see.

Any thoughts how I can get the rear deck to stop the rattling when I drive over bumps?

Found this article for rear deck rattle...
http://www.shiftice.com/bose_deck_fix.html

 

The dealer fixed my rear deck rattle. They removed the rear deck and insulated around the 3rd brake light; problem solved! Let them know that's the fix, and they should do it for you. They also fixed another rattle for me. They were happy to fix the rattles and didn't give me any grief.