I too had the filling issue. More on that in a minute. First of all though, I would say that I have had nearly zero problems with the truck - 2019 BIghorn, 5.7, 3:92, 4x4, ~41000 miles now. I bought it new in December 2021. The touch screen went wonky on me once, but the dealer did some sort of magic and it hasn't happened since. I also had to replace a left head light assembly ($$$) because I hit a wild turkey (yes, we have a lot of them in the Pacific Northwest).
Anyhow, the second winter I had my truck, I started having issues filling the tank. I took it to the dealership under warranty, they kept it a week and when it was returned, I was able to fill just fine I don't know what they did, but it worked. Fast forward to this winter and the same issue has occurred. The gas pump kept clicking off after about a gallon. Rather than take it in to the same exasperatingly slow dealer, I decided to "fix" it myself.
I don't recommend this method, but it worked for me:
I took a vacuum cup - about 3" in diameter - commonly used on industrial equipment for handling various types of material like glass, cardboard, paper, etc and adapted the cup to the air nozzle from my compressor. I set the air pressure to about 30 PSI, covered the gas filler neck and squeezed the handle on the air nozzle slowly. As the air started to fill the tank, I started smelling gas - just a whiff or two. I stopped, waited for a couple of minutes and did it again. I'm not sure exactly what I was accomplishing, but it worked. Two week later now and my filling problem has gone away.
I'm going to put my flame suit on, because I know someone is going to take exception to the way I went about this. And again, I don't recommend that anyone else follow these instructions. But FYI - it worked for me.
