Yes, do as Longshot says and then, even if the PCM WAS reflashed, you should at least be able to read the hex code when you plug the Gryphon in. If the code is different, you WERE reflashed.
But, it really sounds like you did not allow the Gryphon to boot properly. The ignition key has to be ON (engine off) before you plug in the Gryphon. (Note: this advice does not seem to apply to the newer CS/CTS units - they seem happy with the ignition in either state.)
- Jack
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