what the heck is this??

[02 281 GT]

There does not appear to be any pre programmed tunes.

0-2 disabled PCM, 3-4 work but appear to be the same tune, 5-6 disable the pcm.

Is it possible it was just never tuned, or was it wiped out??

I doubt anyone would install a chip without any tunes. And it probably wasn't wiped. You'll not notice much of a difference in the way the car runs besides that it idles a bit higher when on the tune. At least my car does. The throttle response will be better as well. My chip also eliminated the EGR. The CEL comes on if I switch it to the stock tune.