Confirmed on a E38 on the bench 2010 Camaro LS3 I was able to change the VIN through the scanner bidirectional function tab. It even allowed me to put a non US vin in such as if you wanted to blank...

I've got both it won't do it through the v7.5 tuning as a pass thru. I know you can change vin through the scanner I'll test it to verify. I have a spare Autocal that I'd part with too think I paid...