918Designs
+1y
We had the same problem after we bodydropped my friends 99, we couldnt figure it out for a while, then we realized that when the bed sides went down they kinked the filler neck a little, which was causing the gas to back up and kick the pump off, ater that he had the gas door shaved so we just relocated the filler neck. You might see if yours may be kinked also.