Quote Originally Posted by 1BadAction View Post
Doesn't appear that I will be able to make it work. OS 12579405
Upgrade to 2004 truck OS 12587603. You will need to adjust the injector tables - your 2003 truck still uses a fuel return line and fuel rail mounted pressure regulator. 2004+ moved to a returnless system.

Then swap in the transmission segments from a 2004 Corvette A4 with the same OS (12587603).


Regards,
Taz