So, still new to all this, but I had some question for the beginner.
I have noticed that GM used 2 different ecm designs between 1987 and 1992
1987/90 - 24 and 32 pin connector
1991/92 - 32 and 32 pin connector
I think that's right:)
What were the differences between the 2? Are both OBD1?
Are the ALDL ports for them different?
lakedrifter
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