Searched the forum and the help file but didn't find anything that really said one way or the other.
I see that Flashscan can update the VIN in the PCM, but how critical is the correct VIN to the PCM functionality - specifically, can it be changed to that of an older car that never came with LS1s? (like, say, a 60s GM VIN)
If the GM code doesn't permit such a thing, what about the custom OS with the Commercial version?