I have a 2011 chevy silverado 3500hd, crew cab, 8' bed. Today with 11,500 miles I had 2/3 tanks of diesel and I topped it off at a Flying J gas station. Within 50 miles I got the "Water in Gas" warni...
On that new of a truck and being a diesel owner myself, I'd be heading to the nearest shop and get it checked out. I just wouldn't want my fuel system to get ruined. I know GM has a better warranty repair record than Ford but IMO it's not worth taking a chance.