I have a stand alone wiring setup that uses a reprogrammed Cadillac PCM. The transmission valve body was sent out and flashed to be able to paddle shift with their aftermarket shifter without the need for the factory body control module.It would also help to know what you are planning to use for engine/trans control.
Factory Cadillac PCM, Holley, etc.
The 6L90EBut what transmission are you going to use?