Did the truck originally have egr solinoid or did it have evrv. (Electronic vacuum regulating valve)reason ask is I had evrv on my 87 jimmy and after the engine. And ecm swap I wired the egr solenoid and never got it to work.after looking over wire diagrams I realists I didn't. Wire it correctly.the harness has the same wires in it but don't go to the same places.I ended up disablin egr in my bin as I don't require e test.
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