I have a 2018 M8000 that when I started it in my trailer for the first time this year there was quite a bit of gas on the floor of the trailer. When I unloaded and brought into my shop it left a trail of gas into the shop. Any ideas??
Maybe the fuel line from the tank to the fuel rail got rubbed through, or a bad O-ring somewhere. Could also be a cracked tank. Although I am not aware of those tanks cracking. Could also be the fuel pump is leaking around its seal.
Not sure if that one had a recall or not but my 2020 did for the oring on the fuel line to the fuel rail.
