Has anyone installed the Gauge cluster from OPGI in place of the warning lights? I have a '72 Cutlass S. I noticed the harness from the old one was subtly different and since they supply zero documentation I was wondering if it is plug and play (or pray).

 

If your talking about the factory style dash gauges and tach there is a pinout change in the wiring and i think the wiring may be different 70 vs 71-72, try searching for factory gage or guage wireing.

also you will need sending units for oil n temp.

 

Try this

https://classicoldsmobile.com/forums...12/#post651857

 

If OPGI is involved, I wouldn't touch it with a ten-foot pole. Their lies about backorders and shipping dates are infamous.

 

Exactly what I needed. They work fine now. Thanks!