MY 85 cutlass has the rallye pac gauges but I have a Chevrolet engine and their non functional how can I wire them to work with the Chevy engine
I was mistaken on the plug, the clear plug goes to the ECM. The gauges must come through the firewall with the rest of the wires near the column.I am pretty sure all the GM sending units work the same (ie water temp, oil press),they regulate to ground. If you hook up the wires they should work. I put a Corvette TPI engine in mine and they all work. The plug(clear)for them is under the right side of your dash.
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