OK Tim, I stand corrected again. The gas tank is either a 16 gallon for the 1/2 ton Panel/Suburban/Canopy Express or 18 gallon for the 1 ton Panel/Canopy Express and the interior cab gas tank is 17 1/2 gallons used in pick ups.
All I had to do was look up all of my paperwork that I have collected for the past few years. I had made the 13 gallon mistake by looking at a Canadian manual. 16 US gallons = 13.3227814 Imperial gallons
