There's evidence to suggest that the majority of the fuel system problems experienced by Dmax owners has to do with the poor quality of the fuel found in this Country vs Europe.
Racor, who developed the system on your truck has worked with GM to produce their pre OEM filter set up. Word has it that since GM was in on it, it shouldn't affect your warranty, but that's not in print on anything I've seen from GM. Warranty problems tend to be associated with the SM at your dealership. If he's okay with a particular filter set up, you're probably okay.
Whether you go pre or post OEM is a matter of substantial discussion and varying opinions here. You'll need to do a few searches on the subject, there's lots of material on it here, and make your own decision about whether or not it's necessary, and if so, which system is best for you.
If you decide to install one, you might consult with your SM to see what his opinion is before proceeding. My SM has been difficult to work with, so I got his approval before I installed the system I have.
I don't mean to duck your question, but you'll have to answer it yourself through your own research.
No problems. I look at it once in awhile just to verify no leaks or wiring problems, but it's mostly to show other people. I've got the feeling I may cuss it when it comes time for the first change, since I did not loosen the filter and re-tighten it before the install. But I bought the Racor filter wrench, and already have a strap wrench so it shouldn't be too bad.
My SM has a copy of the Racor bulletin and I have one with the truck papers just in case there's ever a question...
It's the Racor Product Bulletin that describes the filter set up and says to consult your local GMC truck dealer or Racor distributor for installation and assistance. It also gives the part numbers for the actual Racor kit and filter guard.
The Racor kit costs a bit more than Greg's kit and there are a few differences in them, but the major components are the same. The filter guards are quite a bit different.
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