LOL well its a bit more involved than just the two wires you mentioned. That is actually the easy part. The hard part, some would say, is finding someone with a programmer, ie DHP or HPTuners, to set the parameters in the Tranny codes to allow the use of the Performance Switch.Originally Posted by 98GT3800
So the ground that hooks up to the switch, and the wire that connects to the pcm is (the hot wire) just grounded out to activate the PERFORMANCE SHIFT. you'd think it would be more complicated. Good write up..
Pretty much all the Grand Prixs have this feature, but only that certain spectrum between what? 1999-2001 had the feature actively turned on in the PCM. After that, they GM, shut the feature off in the PCM, but left it there to be turned on by people like us
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