Proving I know nothing
Joined: Jan 2002
Posts: 757
Likes: 10
From: Middle of MI
Car: 1989 Trans Am GTA
Engine: Stock LS1
Transmission: T56
Axle/Gears: 3.70 9 bolt
Someone correct me if I am wrong, but I think that any car with feedback controlled motor (one that will set check engine lights) is technically OBD I. So I suppose it would be whenever they put TPIs in, or TBIs whichever came first.
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