I have no idea , but my 16 ram Laramie 5.7 does the same thing , have been stuck at service station with no tools for longgggg timesI have had two issues so far with my Ram when filling with gas.
1. Similar to what is being described above where it won't fill without stopping repeatedly.
2. The gas nozzle gets stuck in the tank and will not release.
Any ideas on the second?
It seems to happen more often that the first.