Originally Posted by
ScarabEpic22
I'd just use a factory CTS-V E67 ECM + OS for a manual and call it a day. You can control everything like it's in the vehicle, just kill VATS and be on your merry way. Run a CTS-V pedal (or a compatible one) and use the factory throttle body. Advantages over the 0411 are that it is already tuned for it (just fine tuning required), you can control the heat exchanger pump via the ECM, and control boost via ECM vs external boost controller (imagine there are others as well).
There is a learning curve for tuning a Gen IV ECM vs a Gen III, but it's not horrible and the same principles apply just takes a little different approach.