Hi I need some help writing my ECU to delete vats so I can start it. I purchased this van with a blinking security light and a warning from the owner. Not knowing much about passlock I ignored until it died and required a tow home. It won't take a relearn and the light is on steady.

It is a 12200411 pcm but this OS doesn't come up with google search. I don't know how to create an xdf to delete vats. The XDFs that are close to my van with 5.7 and 4l80e don't pass checksum in unerPro. I have most of the tools but need direction. Can I flash it with a different OS/xdf pair? Please help thank you!