I want to test the OB computer on my Cavalier 2.2 liter to get a trouble code. The Connector that's on my Cavalier isnt the 12 pin Connector shown in the book I have, nor the one I found on the internet, Showing the a and b terminals that take a jumper wire in it to retrive the codes. I thought the 95 Cavalier had the ODB 1 System. Im lost!!!! How do I tell if its ODB 1 or ODB 2, and what 2 terminals take the jumper wire to retrive the code.

This one has 2 row of 8 slots with only 4 pins showing. The top row has two pins right together. The bottom row they are 2 , 1 on each the ends of the terminl strip. I'd appreciate the help!
Do I ned a code reader for OBD 1 or can I just use a jumper wire on the pins to get the codes? Whick Pins Do I use?

95 Cavalier 2.2L

It is OBD II.The Plug is like a square plug.Some early GMs are OBD II,1994 and 1995 models.