Hello Steve
Welcome and great idea to get your PCM tuned. As for your question I recommend looking for a Corvette club in your area and getting info on who they recommend. You might think about joining. Local to TN is Radar and Cannon(AR) . Jrose is in OK and very knowledgeable and active in the Corvette community. If they dont post to your thread PM them. They are more than happy to help. Best of Luck
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SOLD MY C5 Looking for my next one