From my opinion from working on HMMWV or Hummers in the Marines stay away for the 6.2 I can't remember how many heads and head gaskets I had to replace, but I replaced enough to know the naturally asperated 6.2 isn't worth 2 cents and is a severe dissapointment on the performance side. But that is my experiance on the mater of early GM Diesals.
"Opinions are like A-Holes everyone has one and they all stink"
