When I did the LS swap in my 80 Grand Prix with a 301 I tagged the wires and everything went good except I have never had the temp gauge working all others worked. So that has been one of the things I have been trying to sort out. I have the Camaro 3 wire sensor and it is reading properly in the ECM. I have grounded the wire I had hooked up and the gauge stays at 0. The wiring diagram I have shows the temp wire should be a dark green I have also found a wiring diagram saying green with a white stripe. I have tried grounding several different green wires.
here is a picture of the wire I had hooked up I wonder if anyone could identify it
here is a picture of the wire I had hooked up I wonder if anyone could identify it