OBDII tuning hardware/software is a bit more pricey than OBDI.
Try looking at this site http://www.moates.net/gm-1996present...-c-100_58.html
Craig Moates and his team can hook you up with what you need, and point you in the right direction.
A word of caution though....once you get started tuning...........you won't be able to stop!!
James
P.S. A spare PCM wouldn't be a bad thing to have just in case you let the smoke out of the one you have...JMHO
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