Grand Am has intermittent problem: sometimes pushes fuel back up filler neck even though guage reads empty.

For fuel to enter the fuel tank, air needs to escape via a vent that rides along the side of the filler tube. Check to make sure nothing it plugging that.

Jake and Nickolas, that was the plan for first thing tomorrow. I changed the pump about a month ago and when the tank was down I did not notice anything amiss, I wonder if there is a rollover valve like in Chrysler products that could be the problem. The customer was not able to supply much info, she did her best.

To the best of my knowledge, there is no rollover valve. Check to make sure the breather is clear and not plugged.