ANOTHER Check Engine Light Question!
OK ... as some of you already know, I'm dropping a 1997 5.7 L vortec into a 1991 Sonoma. It runs, but now I'm trying to clean up the wiring harness. On the '97 setup the MIL (check engine light) comes on when the VCM opens a ground, allowing 12V to pass through the bulb. Is this the same as on the '91 Sonoma instrument panel harness?
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