Quote Originally Posted by brokeazfunk View Post
In a GTP with the "performance" button on the shifter, when not in performance mode, is it the same as a stock PCM?

Meaning, the PCM mods don't kick in or activate until I push the button putting it into performance mode, leaving it the same as a stock PCM until that point. Is this correct?
It all depends on which "canned" tune you have. The performance shift button just tells the PCM to swap a few tables related to shifting to a set specifically for performance shift. The canned tune could leave both sets of tables stock, it could modify just the performance shift tables and leave the standard ones stock (or vice versa) or could modify both tables to be different. It just depends on who did the tuning. This is a question you should direct to the vendor.