Chevy Express 3500 with 6.0

Is your Van regular or extended? So I have a 2017 Extended Express, with 6.0. I had a 2014 regular Express. The GM trailer weight is 9600 lbs for regular, 9200 lbs for extended. My trailer weighed 8400 lbs new on the way home. I have towed my trailer with the both vans. I went from Michigan to west Iowa (think of Nebraska) last summer. I had no issues, although there was only two of us, and only one row of bench seats (there was an elliptical machine in van on way out). The vehicle did fine, but I kept it to 65 mph or less. I had found an air deflector for $20, so I installed that and got 8.8 mpg.

I would reduce the max trailer weight by anticipated passenger weight. It will not win any races, but it gets the job done.