1998 Pontiac Other

My daughter has a 1998 Trans Am that takes her approximately 20 mins to fill her gas tank. She can put a few cents at a time in and then has to wait for the gas to drain into the tank before starting back up again. We have had the tank completely out of the car and can find no visible reason. Is this problem typical of the Trans Am? What can we do short of taking it to the dealer?
April 24, 2007.

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