I pulled my ECM today and found a chip from Street and Performance Inc. It’s labeled LT4 but I have an LT1. Am I missing something? I have been correcting the previous owners mistakes the past few months. It wouldn’t surprise me if this was funky as well.

 

The only way to tell I saw to do a read on the chip to see what settings are.
could be mislabeled.

 

I thought the only OBD1 4th gens with PROMs were in 1992-1993. There were no LT4s in those years from what I remember.

Curious what the broadcast code is on the chip if you peeled up the decal.