I couldn't find the place you were talking about but I did manage to get the fuel filter off. I turned on the key and tried to start it with the 1st tank selected and no gas or no sound like a fuel pump. I tried again with the second tank and heard the fuel pump come on for a second then stop, it sent a very small amount of gas to where the fuel filter was. I am thinking at this point the gas is the problem. Do both tanks use the same fuel filter? Do the fuel pumps reside within the tanks? I guess I just follow the lines backwards? The only problem is they all lead to the top of the tank and the only way to access them is to drop the tanks =/ Is that my next step?

It will be under the hood, either on the fuel rail itself the part that sits atop the injectors or on the metal line that supplies the rail. Don't recall on which it is, but definitely under the hood. you can also just disconnect the fuel filter and then turn it to the on position, essentially you're just trying to safely see if the pump is pumping most of these truck need a disconnect tool to disconnect the fuel filter, that's why id try the test port. Hope this helps, if my truck was right next to me, id just go take a pic for ya.

Thanks for your post! I have a question about the fuel test port. Is it to towards the front of the truck or back towards the back where the tanks are? I see where the fuel filter is but I dont see the area you are talking about. I took off the fuel connector on the engine side of the fuel filter and there was nothing in there. I did not have the key turned on though. Do you have a diagram of the fuel lines by any chance?