Just found that 1996 l4 pcm is what you need. Some link for reference,
It is used on gramd am , cavalier and so on.
Beware that similar case pcm is used from 93-95 and it is obd1.
For reference, 1995 and newer J cars (Cavalier and Sunfire) use an external ecm as pictured above. 1993-1994 J cars used an interior mounted ecm. V6 J cars from 93 and 94 actually used a 1227730.
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