I need help!

I work for a dealership and at times have to fill up new cars/trucks that are really low on fuel. In this case, it was a Chevy Express van, most likely straight from the manufacturer (range on the dash just said “low”).

It has happened before where I try to fuel the truck and the filler “clicks” like it is full only after a few dollars. I would finished the transaction, start the truck again and the try refilling afterwards and it works like normal.

Is there something with the emtpy tank that makes the pump malfunction like this? Is it potentially a problem with these express vans? Any help is appreciated, thanks.