My truck is still stok until this weekend. Ever since It was new it sometimes throws white smoke from the exhaust. Im not sure if this has anything to do with the regen or not. Anyone get this white smoke? I took my truck to the dealer and I think the diesel mechanic does not know too much about the LMM nor regen. The LMM is not too popular where I live. I acually bought the first one from the dealer and had to wait 3 months get it in.

No worries here, Its more than likly your fuel has a high content of sulfur. Eventhough you may be using the ultra low fuel, the fuel may have had too much sulfur. Do a search, we've talked about this before.

"Temporary blue, gray, or white smoke may be an indication of a fuel with high sulfur content".

Yes, I can tell you with certainty from experience that a regeneraon cycle after using fuel with sulfur higher than the specified ulsd WILL produce blue/white smoke. It lasts maybe up to 10 minutes and then disappears again.