[car46999]

Got the PCB today, thanks again for sending it.

It is crazy cool that places like JLPCB exist, and awesome that they can make custom PCBs for such a reasonable price. Just a few years ago our options would have been a protoboard or DIY etching.

I made a little progress on testing the GM sensor (PN: 16187556). I used an analog vacuum source to test from 2 inHg to ~25 inHg. The output was rock solid stable and very linear as shown in the graph.

I was not able to find a data sheet on this sensor, so I also tested the current draw over the range of vacuum. It was 0.006A.

So it looks like this sensor will work for my brother's truck. I am going to go through my parts I have on hand and make a Mouser order to complete it.