Asked by Alec Oct 12, 2009 at 12:37 PM about the 1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe .... think i mentioned an aftermarket PCM the ZZP pcm is OK at best though you can tune them to be better, i have a DHP PCM in mine and its not adjustable but for the mods i have and my buddy have its a sure thing. read more