GM probably needed to save $0.1378695 per car so this was the easiest novelty to chop out lol. As mentioned above if there is no switch it is basically in perf shift all the time though the light throttle shift firmness may be a bit softer than if it did have perf shift. Its not a big deal, yeah its nice to hit the button but when you pull off an exit ramp and stab the throttle then have a 5200 rpm WOT shift you get pissed pretty easy! You can add it to your car BUT as of now I think the DHP powertuner is the only tuner that will allow you to enable use of the switch as it is an option in the pcm as mentioned above that needs to be enabled. HPTuners mentioned it may be added but who knows when, I have been waiting a long long time for a few things to get added and I never get clear answers on when because the V6 cars take so long to add features to.
