Truckerman I too have just purchased a 2004 d/a 2500 hd and so far after only a few weeks i know I have made the right decision.I am a class 8 diesel mechanic by trade with extensive knowledge of the detroit series 60 but this engine is also a brand new game to me.I understand pm maintenance is a must.I have read all the forum's and opinions of some very fine knowledgeable folks and by calling my local dealer have come to some conclusions for my d/a rig.My gm dealer sells standyne (i think thats correct spelling)fuel additive over the counter so I called a place in virginia and ordered a case direct which was cheaper.I figured if gm sells it it must be approved.Its alcohol free.I've read where different peeps recommend it.That should put more plus's on my side towards this injector issue.Good fuel =less problems all the way around.
Second:fuel filter some peeps recommend secondary filtering but for my location salem oregon winter's are fairly mild compared to the rest of the country.Haven't seen 20 degrees since I moved from Indiana so I am going with regular fuel filter changes as prescribed by manual and this forum and my own knowledge of how important that fuel filter is.
Third:Truck set me back enough so I am starting the oil off with synthetic rotella 5w40.I believe in rotella and have seen living proof of series 60 engines that use it.My choice and opinion only...I will be using baldwin filters both oil and fuel.My company runs them in 15,000 trucks so they must not be that bad of filter.No filter is any good if you don't change it at correct interval's.(but you already know that)
We run synthetic oil in the diff's on our big rigs and thats the only way to go.As stated by other peeps in the forum.Yes its pricey but advantage's far outweigh the disadvantage's
Fourth:no brainer and you know it keep the rig greased and it will last forever.This is a awesome rig and like you I want to start it off with every chance to age gracefully as I can.I don't want to induce problems.The reason I bought this unit is because opinion's of peeps that have owned the d/a for over a year with no problems what-so-ever,but they also do the maintenance as prescribed.Enjoy your rig as will I.Rides better than my 99 grand prix gt that I traded and faster too...