[2500HD4x4]

If there is water in the fuel, I assume the whole tank would have to be drained? Or could I simply replace the fuel filter several times over the course of a month or so? Does the fuel filter filter water, or just debris?

What are the symptoms of water in the fuel? Woudn't the engine also run rough? I am suspicious of the seal around the tank where the fuel pump is mounted. I am also suspicious of the fuel pump itself.

Just trying to determine if it's water in the fuel, a fuel pump starting to go bad, or maybe the electrical connection between the wiring harness and the fuel pump?

There has been a lot of rain lately, so that would reinforce the water in fuel idea.....