So had to do my first fill up on the truck, which per my window sticker is the extended 36 gallon tank. I had 9 miles of range left and was only able to fit 31.45 gallons.. I feel like I should have been able to pump more into that tank. I know its not the standard tank size, but has any one else noticed that there tank doesn't seem to be an actual 36 gallon tank, or my fuel gauge-level isn't correct at all ( I started the truck on a level surface)