For the '09 and '10 the CTS definitely does not program the TCM. The shift firmness is modified a little by tweaking the reported torque output from the ECM. This is directly from Bill at PHP a couple of weeks ago. He has been asking Edge to do this for many months. It was in beta in October, but no word on a release date. The lack of TCM control means that the tuner has limited influence on shift firmness and no influence on shift points. My truck still has over a second lag before downshifting at highway speed. PHP said that their TCM modifications (currently available when using the SCT) help significantly with this delay.

 

So I take it the 04 to 08 cts evolutions do program the tcm conserdering that the evolutions already program thr tcm.

 

The 04 to 08 does not have a separate TCM - the tranny functions are handled by the PCM. All the programmers for the 04-08 can tweak the tranny.

 

I did not know that. Well answers my questions.