Sorry the Subject field was alittle scary, just wanted to grab attention. I talked with 3 engineers today, which were in some way afilitated with the D-max. I found out that the new injectors went into all trucks built after 12-01. The problem they feel is that the injectors are developing hairline cracks that may not show up until high fuel pressure is developed. This is what is allowing fuel/oil dilution. The redesign was to address this problem but has failed. We talked in great length regarding additional filtration and th Racor setup that is being tested in Canada which is supposed to be a dealer installed OPTION. The salesmen is to try and sell it as additional at the time of sale. "Sir, thanks for purchasing your 45k truck, but we need to add the 150.00 filter setup to get you through warr"!!! I showed him the Mega and the Racor setup and he was familier with both of them.. I asked him about cavitation/air in system and its potential problems, he said there is none whatso ever and that some air should be expected in system. He mentioned the clean line test and a perfect operating system will have bubbles. I asked him why he thought that injectors were failing and he said contamination and water. Hearing that I come to the conclusion out loud that the oem filter setup is junk, he didnt like that at all. Biggest problem he is seeing is customers not changing the fuel filter often enough. He stuck with the 15k rule on them. They are well aware of the situation and at this point have no idea the exact fix for the problem. The LLY will surely help in the diag standpoint and the labor to replace.. They will go from a 96 volt system to a 48 volt system also, not sure on why. I would imagine less heat in the FICM and would require less cooling. When mentioning lift pumps, his biggest concern was damage to the FICM, not damage to the HPP as I would have thought. I told him we only run at about 1-2 psi, just enough to put system under pressure. Long story short, GM at this point dont know what to do about our little problem.