2004 Pontiac Grand Am Shakes and vibrates

Depending on where your vibrations are will tell you your problem. If you feel it in the steering wheel its in your front end, if you feel it in your seat its usualy in the back, could be a nail in tire, or wheel out of ballance. Or if in front could be a disc, depending on how hard you drive it(peeling out alot)could be your universal joints in the drive shaft. Good luck friend.