Just recently something started rattling in the front left corner of my tahoe. At first I thought it was in the dash but I pulled the bezel and cluster and looked around behind the dash and can't find anything loose. I wonder if there is much that can come loose in the door? It's not just a normal minor rattle either something has definitely come loose because the sound is loud and impossible to ignore. I'd rather not tear the interior apart more than necessary, any ideas? It's definitely inside the truck and sounds like it's a dull thud hitting metal or something