I’ve got a solstice project I’m dealing with and was poking around the engine bay harness and realized it used the E37 ECM. I’ve been looking at some of the harness pinouts for x1/x2. And realized they are relatively the same between the 37/38, looks
Like theoretically I can build the proper harness, flash the E37 with an OS for the V8 like a 2008 g8 that uses an E38 ecm, or plug in an e38 with with the proper V8 OS to get something to happen,


The question is, if I match the vin of the NEW OS (E37 orE38) what are the odds the BCM will still be able to communicate with it?