I have a button under my OS tab that reads "Duramax Switchable RTT". What does this do? I have heard from other tuner companies that you could hook up a switch to the VCM on a Duramax and swap between 2 tunes on the fly. Is this true and is this it? I'm tuning my gas burner right now but I'm getting a lot of pressure from a few guys to get my @$$ in gear with Duramax tunes.
Thanks for your help