Found a super easy solution to something I thought was going to be a huge pain. I thought I needed two coolant temp sensors. One to feed the PCM (left front head), and one to feed the gauge in the dash (right rear head?). It's nearly impossible to get to the sensor port/tap in the right head once it's crammed into the truck. So I started doing a little research. Turns out, someone figured this out long ago just using a stock 3 pin sensor from an early LS1.
Stock sensor left, new sensor right
And a new pigtail to go with
The "A" and "B" wires in the new pigtail replace the "A" and "B" wires from the original coolant temp sensor plug in the LQ4 harness to feed the PCM. The third "C" wire will splice into the S10 harness and feed the IPC. Simple!
I guess guys have been doing this for years and it works great. Another problem solved using off the shelf factory GM parts.
