Quote:
Originally Posted by Tru2Chevy
I would contact support for HPTuners then, and figure out why you can't put the stock tune back in.
- Justin
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yeah theres a bug in .18 that will give you an invalid vin/os mismatch on many 97/98 files because the vin isnt stored in the same spot in the pcm as later models. I can give you the newest beta or you can go back to .16 temporarily its up to you.