Curious about this too, as I have the bastard child year 95 as well. The sellers say that this won't work on trucks without a "truck adapter" whatever that means, but when searching for "truck adapter" nothing comes up, at least on ob2tool and obdii365. Any insight on this "truck adapter" Ferm?
So far I'm as happy as can be with it. I did have to pull it apart and redo some cold solder joints on the screen backlight connections, but other than that it's been rock solid. The truck adaptor is for working on semi's and such, mine works fine on the 95 side for abs and airbag diag, and connects fine to the obd2 side for the engine and trans. And do not try and update the card or tech2, it will brick it. Mine came with the most recent update on the card and GM has no plans if releasing anymore updates for them.