Is there someone I can contact to help me with this problem

I have tried uninstalling it and the vehicle shifts fine i have tried to install it again and i have a 1-2 flare shift. You are saying that nothing changes the tcm but something is happening.

I don't know if this is the place to ask questions but I have purchased a U7191 for my Trailblazer SS and there is no difference in power and I have a 1-2 flare shift any info would be good.