As it says in my signature I have a 05 duramax with the Bullydog PMT loaded. I took my truck into the dealership to have some work done to it, and while it was there they loaded six updates into the ECM. I was under the impression that this would wipe out the Bullydog programming, but it doesn't seem to have. It will still let me switch power lvls on the fly, and if I go from Tow to Stock you can still hear a change in the motor, so it seems like everything is working. How is this possible and is there any way that I can check for sure that everything is still working correctly?

It is possible that the updates did not have any affect on the engine parameters. If you can hear the motor change, then it is still working. Thats a good thing. Hey what version do you have? Do you have Crazy Larry or want to get it?

No I don't have the Crazy Larry. I have the stock tranny so there is no way that the tranny could take it. I don't even run the PMT on the Extreme setting for fear of limping it. I would like to put a built tranny in it and go for more HP, but I just can't justify spending that kind of money for something like that.