I'm gonna add to this because I'm having the same problem. Unfortunately I haven't fixed it yet.
My symptoms are this. Car runs fine, stumbles or stalls for no reason, low oil level comes on, occasionally goes off and engine keeps running, but a/c stops working. Turning off the car and restarting brings back the a/c.
Now, the fuel pump circuit goes through the oil pressure sender. Oil pressure goes to zero, fuel pump cuts out. I haven't been able to prove that throws a code. I changed the sender (there's a story in stupidity) but still have the problem.
I described the problem to a club member who is a much better mechanic than I am. His first reaction was fuel pump. I trusted his opinion. $700 and new fuel pump later, still not fixed.
The one thing I do know with my car is the ground strap on the back to the motor to the firewall is broken. At this point I think this is an electrical issue. Like you, I just don't have time to work on the car. Which is killing me.
BTW I have a 95 Caprice wagon. Most of the stuff under the hood is the same.