I currently have a GM OS 12597120 8.1L 2007. I have a tune file from my 12592618 8.1L 2005 that I desperately want to use in my 2007. I can't find a COS for my 07. Is Holden Crazy stock tunes all COS files? I am probably way off base if I am how do I get a COS for 12597120?
Thanks,
Stan