hpp3 ?
Since whomever originally owned the HPP3 never removed the tune from their car (if they had the HPP3 would no longer be VIN locked) then that means unlocking the HPP3 is the same as a brand new unit and 2 people then get tunes...
If you haven't already bought it ... don't if you have... best bet would be to talk to whomever you bought it from and have them remove the hpp3 stuf from their car completely (which they should have done when they sold it since a locked HPP3 is useless)
I don't think just changing the VIN would work though... the HPP3 will think that it's in use ... so it's already edited a PCM... then you connect to a non HPP3 edited PCM ...






