2006 Duramax LLY vs. LBZ
Couple questions, Other than the 8th vin digit, I've read that the LBZ will have the newer "DuramaxAllison" badge on the side where as the LLY will just say "Duramax. Do you guys agree? Also, unde...
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Turtle n Peeps wrote:christopherglenn wrote:
Actually that started with the new ecm on the LMM, 07.5 trucks. An 07 or earlier set back to stock leaves no fingerprints.
Not true. The LBZ came out with the new 32 bit processor. Believe me, GM can tell if an LBZ truck was ever tuned by the software they have. This is a full proof way of telling.GM about LBZ wrote:
First application of new, 32-bit E35 controller, which adjusts and compensates for the fuel flow to bolster efficiency and reduce emissions
They look at the CVN history. The LBZ and older only report the last update (most recent flash), the LMM and newer report the last 10. Flash a LBZ to factory, and the history only shows it as a factory, the LMM shows a non factory tune (or several) with the last one being factory. It also only updates the history if is it is different - flash a factory tune 10 times in a row and it only counts as 1 of the 10 in the history.
