2004 Bonneville GXP "Zero" oil pressure
Had my oil changed about 500 miles ago (not that it may matter), but for the first time I've owned the car (now has 90K on it) I received a "Check Gauges" notification and "Low Oil Pressure" note. Looked at the oil gauge and it was sitting on 0 pressure. I reved it up to see if it would move, it did (a little) and then I shut off the car. Checked oil, is full, no leaks, no funny noises before hand, etc. Started the car, and the gauge was reading normal. Drove about 15 miles and got the same message again. Went to pull over and about the time I was to put it in park, the gauge popped back up to normal position. Went another mile, and the same message and oil gauge 0 pressure was back. Pulled over, shut it off, checked everything again, started it, pressure gauge reading good again, and drove it home. Started it this morning, no issues, drove it 22 miles and still no issues. The day before, pulling into my driveway to get the mail, put car in park, and noticed that the idle RPM was fluctuating up and down. Got in, reved it up, and it stopped. Thinking I have an electrical issue somewhere? Pressure sensing unit? Gad gauge? Replaced GXP instrument cluster with a rebuilt one about a year ago (due to faulty tach) while under warranty. Hope I don't have to do it again on my dime! Scared to drive it with not really knowing for sure what my problem might be. Don't want to melt the engine, but it sure seems like an electrical connection, pressure switch, or gauge issue. Any Suggestions??
Thanks in advance-