Here is a picture of how to wire a gauge pod into a G-Body car that came from the factory without them. All you need is oil pressure sending unit and brown wiring, temperture sending unit and green wire and clip. Wire the grounds from the oil, temp and voltage gauge together, wire the 12 volt power connections for the oil, temp and volt gauge together and connect to a fused source in the fuse block. Connect the wiring to the sending units and its done. the " S " is where the sending units connect. DO NOT CONNECT ANYTHING TO THE FUEL GAGE ( false readings will result )