I got a 06 lbz. the problem is I went to drive the truck yesterday and it was running really rough, but i went to pull out in traffic and the truck started bucking i was getting all white and gray smoke with no power it would not go faster the 5 mph. Also I have noticed NO turbo pressure. Anyone with ideas please? I did get maf code and a egr code but makes not sense thanks everyone

I'm not sure but it sounds like an injector problem to me. That is what happened to my '05 LLY.

I would bet injectors too. My LLY did the same thing also. Do you have any way to check the balance rates like a Tech 2 or PPE tuner?