While I was traveling from Phoenix to Missoula I was using cruise control and was loving the automatic slow/speed function, but when the car would slow down I would get a squeal from what appears to be the drivers side rear wheel. Maybe it's the amount of consistent pressure applied by the car that did it? I also had a rattle that was coming from the passenger side exhaust heat shield. Heat shield fixed, but squeal isn't repeatable when I brake.