OBD I runs from early eighties ( I want to say 81?) to mid 90's. Most cars had OBDII by 1994 but it depends on the car. Looking at your sig it looks like all of yours would be ODB II.
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-Nick
9/11/01- Never Forget
2002 Pontiac Trans-Am WS6 # 206
Chasing 10's
469RWH/437RWTQ
11.05 @ 123
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