I recently got my lq4 going in my 2000 rcsb (originally a 4.3) with a psi standalone harness installed. The truck runs just fine, but now I have to work on getting my gauges going (tach, speedo, oil pressure, volt, coolant temp) I can see that the speedo, coolant temp, and tach output signals come from the pcm. I imagine that a signal for the volt can come from any ignition power source in the dash. The oil pressure is not included as a part of the harness, but i have the sending unit with a single wire. When hooking up these wires from their respective sensors or pcm, can they be directly wired to the factory sensors (eg oil sending unit wire direct to gauge? or is there more to it than that?) I do have access to schematics through a friend's shop, but I didnt know if anyone has experience with this.

 

nvmd got them all working