I don't remember anyone posting that they have done the swap to the GEN II.
GM says it can't be done, I think with enough trial, error, and money you could probably do it.
The smarter way would be to rebuild your GEN I.
Usually the problem is with the pressure switches which is easy to fix.
The 6T40/6T45 has been around a long time and has had many changes.
As you know the 6T40 GEN III has been out for a while now.
Do you feel lucky??
2014 Equinox LTZ FWD 3.6L. V-6 (LFX)
GM6T70 Transmission-Gen II(M7W)
Crystal Red Tintcoat-Brownstone Leather-(FE2) Suspension-18" Wheels
Build Date: Nov. 04, 2013-Delivery Date: Nov. 25, 2013