and appears no belt is broken
it feels excatly like i have a flat tire,but when i pull over and check all the on 2002 Buick Century
it may be a shifted belt in a tire. get it checked asap as it may fail completely.
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When you jack the car up, you might as well pull on the tire top and bottom to make sure ball joints are ok too. Pull on tire at 9 and 3 o'clock positions to check tie rods as well. Can't hurt to do if you are raising the car to check tires out anyway.