ODBI or ODBII

a 96 should have OBDII

you can tell by the plug ...they standardized the plug when they went to OBDII as a federal mandate.

OBDII is a huge advantage over the system before it because OBDII has live data stream so you can see the computer in opration as the engine is running and a snap-on scanner can even modify parameters for test purposes. The previous systems were more of a "snapshot" format and you scan and it picks up stored data from the computer about certain "events"