After a test, some thought and discussion with an expert, the signals aren't going to work out of the gate. The power-fold, however, is looking hopeful. It should work after I pop the Korean switch in place. The power-fold doesn't look to rely on the BCM, only the mirror switch, but this is a guess after looking at service manual diagrams.
I'm going to have to follow the turn signal wire from the mirror connector to the BCM, pull it and splice it to the front turn signal output. It would take some programming work to make it work through the BCM and I'm nowhere near the only guy I know of that could possibly do it. I even tried GM's TISWeb tech line and the engineers told me that if it didn't come as an option on the US cars, they couldn't add it with a calibration.
Please, if you pray, I urge you to pray for this to work.
