OK, had EFI for years, pretty darn happy with and have the DSP5 with IRob tuning. (2006 LBZ) Have all but the latest firmware loaded.
Where I live they now read the PCM when doing an emissions check. However since I have the DSP5 tune it does not show the correct vin so it will not read into the system. Upon flashing all to stock, it passed fine.
My #1 tune is stock but can change the vin# on the PCM to read the same as the stock tune while keeping my DSP5 tune?
I did do a search but I didn't find anything or searched wrong. Any help would be great!!