New to this forum so I sorry if this isn't in the right spot. My girlfriend has a 2006 Cobalt LS with 117,000 on it. It sounds like there is a chain rattling when you go over bumps. I'm pretty sure it is in the rear end somewhere. She had her dad take the car to a place I do no trust to even put air in the tires while we were out of town a few months back. They said they tightened some rear pan that was rattling but did not provide any paper work when he picked it up. I am curious if anyone may know what pan it could be? Also, is there any suggestions on what brand to get for the intermediate steering shaft? That has been rattling for too long now and I am forcing her to change it. Thanks