Just started driving a Cobalt LT '09. As a bike enthusiast I am looking for simplicity and quiet performance in a car. I realize that it is a '09 and I may have to put up with some noise. Nonetheless I would like help with the following perceptions if possible: minor rattling noise when AC is on and minor squeal when idling and driving slow (not sure if it can be heard when driving above 30 mph). I don't feel the idling and driving noise is from the engine, mainly because it stops when I brake, but I don't know. Would be interested to read or watch videos pertaining to other experiences so that I can maintain and enjoy this matter. Kindest regards, Eric.