Wednesday morning upon cranking the car, "Low Oil Level" appeared on the DIC. I immediately turned off car and added 1 quart of oil. I let it set a few mins and checked the level. I looked to be a little above the full line. When I cranked it again the message was not there. I know from reading some archived messages on this topic that turning if off and back on resets the message, but at the time i did not know this and thought it was ok, but was a little concerned that i may have put too much in since it was showing above the line. Wednesday upon leaving work, it came on again. I didn't have any oil with me and so i just turned if off and back on and of course it was gone. At work i park with the car angled toward the front and thought that maybe this was why it was on. At home, my garage is level. This morning It came on again. I let it run a little and then turned it off and back on...message gone. Then when i got to work i read about how turning it off and on just resets the message. I just checked the oil here at work and the level showed just above the full line. So i am assuming that the oil level is actually ok and maybe the sensor has an issue.
Now for the background. This past weekend i drove to North Carolina to visit family. 800 miles round trip. I checked the oil when i got there to see if it had burned any and the level was half between low and full, so i thought it didn't burn any.
That is about it. If anyone has any suggestions, let me know. Should I take it in to dealer if this keeps happening?
Also, I have seen posts about people checking past codes. How do you do this? I saw something about holding in one of the DIC buttons while pressing one of the other ones, but have not gotten this to display any of the past "Low Oil Level" codes.
TIA.

 

I find that I can only get a really good reading on the dipstick the following morning after she's been sitting all night. All other readings (10 minutes after shutdown up to 4 hours after shutdown just don't cut it).

 

There is a sensor located in the oil pan that is meant to determine, when you first turn the key to RUN, whether the oil level in the pan is above or below the ADD level. The warning will not set a DTC, so there is no HISTORY in the codes for this that I can find.

If the sensor is working correctly, you should have the following condition ...

Turn key to RUN (don't start engine). Message apppears ..... LOW OIL ..
Turn key to OFF
Turn key to RUN (again, don't start engine) Message should reappear.

If you get the message, and have not started the engine, turn the ignition OFF and manually check the oil level with the dipstick while the car is sitting on LEVEL GROUND. If the dipstick shows adequate oil in the oil pan, then either the oil level sensor is bad, or the wiring between it and the PCM has a problem.

Having the oil level slightly above the FULL mark on the dipstick, assuming you are checking ON LEVEL GROUND, is not a problem. If you read your owner's manual, you will see that GM recommends adding an additional quart over full if you are taking the car out on the track.

Obviously, if the oil in the pan is below the ADD mark, and you are getting a LOW OIL warning, everything is working fine, just be sure to add the needed oil ASAP.

Steve

 

I continue to have the same problem. I think I may have a bad sensor.
The following will help you reset the code:

Press and hold options and then press Fuel 4 times while still holding the options button you must do this quickly. A message will appear saying "Diagonstics" then it will automatically read off the codes. Like....02-PCM(No codes)....03-BCM(No Codes)...ect. if there is a code it will look something like this 02-PCM (1052H) NOTICE THE H at the end of the code, That represents a code that has happened in HISTORY. If there is a C after the code it is CURRENT.
To clear the codes let it automatically cycle through the codes then it will come to (MANUAL DIAGNOSTICS) this is where you can clear codes. Use the options button to scroll forward and the TRIP to scroll backward find the code(s) to be erased like 02-PCM (2Codes). To erase this, press and hold the reset button until it says "NO CODES" There you have done it!!!. To exit the Diagonstic menu press the METRIC BUTTON.

 

AC Delco part # PT374, GM part # 12102747 http://www.rockauto.com has the Z06 oil level sensor for $13.81
It would be a cheap troubleshooting method and they're easy to install.
I had a related sensor fault on a 01 Z06 that turned out to be the wiring harness. The wiring was wrapped tightly and subjet to high temps, causing wires to short through their insulation. This is rare, however.

 

Well things may be OK. No messages in the past 4 startups. I guess it was just at the low level and parking on the incline didn't help.
Thanks guys. I will keep an eye on it though.