I am plumbing the entire fuel system in my 6.2L diesel truck and need some help. First off, what sending unit do the fuel tank use? 2 or 3 hoses? If its 3, whats the third for? Second, the fuel goes from the tank to the lift pump, lift pump to filter, then filter to injection pump correct? D, I have the spin on filter bracket and it has 3 connection holes, the third is for the fuel return hose if I'm not mistaken, which is where I get confused. On the Hayne's diagram, it shows that the injectors' return lines all connect to a single return line, but where does that line go? It shows that it splits and goes to the fuel filter and the tank, how does it do that? Thanks for the help.