Preventive Medicine for my DMAX

[rdlit]

Just purchased a used '03 2500, am in the mod. planning stage and seeking input. first, is there anything i should check concerning a 75k engine, (seems to run very well and decent mpg, apparently well maintained) second, Is there a better replacement fuel filter or only add on secondary kits? any inputs would be appreciated............ Ray

P.S. anyone in the market for a pretty sweet Sub?

[Kennedy]

The new fuel filter is a dual media. I have some notes down in the vendor forum. Secondary filtration is still a good idea. I'd suggest changing engine oil, rear diff and Allison fluid/spin on unless maintenance records show recent changes.