HOWDY BOW-TIE BROS! I gotta quick question. I got a LT1 from a 9C1 ('95 I think) THat was a long time ago and the donor car's gone. I didn't get the ECM or any of the wiring at the time 'cause it was already stripped. I don't know for sure what year it was. How can I tell if it need the OBD-I or OBD-II or does it matter? Does it have to be the 9C1 ECM & harness or could are they interchangable (Camaro, Vette, etc.). Again, I don't know what year it was so I'm stumped on what type of ECM and wiring harness I need to get. I need an ECM and wiring harness that match. What do I need? THANKS FOR ANY HELP YOU CAN GIMME!

 

OBD 1 was for all cars from the early 80's to 1995. 1996 to present is all OBD 2. Your car is OBD 1. I would think the ECM is the same, but the PROM is different being a 9C1.