I've read about a bunch of people having their muffler baffles go bad, but has anyone been having an annoying rattle come from the rear drivers side interior (sounds like it's coming from the rear drivers-side glass panel or that area). Anyway, has anyone taken their cobalt back because of interior rattles and gotten them to fix it? Ithink I've read people taking it back for the muffler baffles and the dealerships replacing the entire exhaust system.

 

i took my car in for rattles and squeaks so many times. everytime i take it in, the noises stop........and therefore they couldnt find them.........that pisses me off so much

 

You may be having the same problem as me as far as the interior rattle:
https://www.cobaltss.net/forums/general-cobalt-68/driver-side-window-rattle-when-shut-3759/

 

I would see if you muffler bearings are loose or blown, they make alot of noise like that. I would take you car back to the dealer and have them check out the muffler bearings.

Fake edit: that is all