Ok, as my research continues (newbie) I have come to the conclusion that another fuel filter will be good for my truck in the long haul along with starting to run fuel additive. What system is the best/easiest install/price etc.? Aside from break-in/fluid/filter changes, this will be my first mod. Then start performance mods as they become more available for the LLY. Larger tires and better shocks also down the road as I wear out the stockers. I was actually surprised when I first got the truck home and could only find one fuel filter, always thought diesels had two! Guess that is why I am a newbie!