Weird AC & Oil Pressure Gauge Issue

[DanDman]

I turned on my A.C. today & it seemed to be cycling through different vent settings & fan speeds. Also the previously no functioning oil pressure gauge was sweeping between 0 & 40 psi. I have the Automatic Climate Control System. Anyone have any ideas what it could be, or where to start troubleshooting?

 

[OR VietVet]

https://www.fixmyoldride.com/Chevro...e7e5cd24ed24635&at_ab=per-2&at_pos=3&at_tot=4

This article may help. Time and time again we see threads here about these all of a sudden intermittent electrical problems. Time and time again turns out to be ground problems. The oil pressure gauge problem could be related to a stepper motor for the gauge or the sender itself. You said, "no functioning oil pressure gauge". What is the actual oil pressure?

Get an oil pressure reading and install new sender when done. https://www.rockauto.com/en/moreinfo.php?pk=320055&cc=1424247&jsn=2273&jsn=2273