Did it work for you? Brian at PCM's for less is an outstanding tuner (the best for LT1's IMO). If for any reason his tune is off, like posted above, I'm sure he'll retune it for free.
More than likely his tune is accurate, and somethings up with the car. The scan will help track it down, but sounds like a bad MAF to me.
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95 Z28 M6, 383, D1SC, FMIC, ect., ect., 614 RWHP with the stock PCM and pump gas!
98 Formula WS6 M6
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