I was referring to the Tech 2, your right, there are a few other non-GM scan tools that will do it.
Unfortunately none of em are inexpensive.
I'm looking for a working Tech 1A or Mastertech 3100 with manuals.
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I was trying to get a working Tech 1 to use on my truck with the TBI system but since I'm not driving it now and I'm driving my new 02, my scan tool works fine. Any output controls I need, I use one of work's Tech 2's, MDI 1 or MDI 2, whatever is not in use.