I can't see how unless I piggyback the two. Even then, the factory PCM in that configuration would still have to have SOME jurisdiction over the motor in order for it to decide when and how the transmission shifts. That totally defeats the purpose of total tuneability. If I wanted the PCM to control the transmission, I would just go with a reburned EEPROM. I could probably have the shift tables tweaked a bit at the same time. But unless you have access to a track and dyno, there is absolutely no way of knowing what the optimal parameters are for a configuration other than stock.
Hence the datalogging and on-the-fly tuning capabilities of standalone management systems. I have always liked that about them.
For NOW, after I get my rebuilt trans installed and certified operational, I am 99.9% sure I am going to go with a custom EEPROM. My car is a veritable Frankenstein now and the last thing I need to do is give it REAL brains. It wouldn't know what to do with them, and frankly, I doubt I would either. But my next build, however, WILL include all I have learned on this car, and them some. That'* when I plan on completely ditching the GM management.
Welcome, downwardly mobile yuppies, to the dawn of the Age of Nefarious.
1993 SSEi - FrankenJinx - dead and gone.
1994 SSE (136K strong) - 180* t-stat,HD alternator, most unequipped SSE on the club, XM radio, Kenwood CD/MP3.
2006 Chevy Malibu Maxx LTZ - Custom 2.25" manifold-back exhaust w/FM-80. Probably the only Maxx with this system.