Sometimes I get a noise from my 04 RWD in the rear when braking. It's hard to describe but it is kind of a creaking/popping kinda sound. It's different than a brake squeal. Mostly I notice it when coming out of my garage first thing in the day. Not consistent however. Thinking it might be the float in the gas tank but not sure. Anything else it could be? Rear drivetrain, possibly brake calipers? I know there was a TSB on 03's for some gussets screws are something. I have no clue as of yet.