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...
Take it to a dealer and drain that tank. Your messing with a CP.4 HPFP that is very sensitive to water and they can explode leaving your fuel system in ruins. As stated the Ford's are running about $12k to fix and many are not warranty. GM is doing better covering the cost but it is now documented you had water in fuel. I wouldn't chance it. Good Luck