CCrane65

That worked like a charm. Now all I have to do is remember it. And why isn't that in the owner's manual?

Gearhead Jim

Glad it worked for you.

I'm told it's considered a maintenance diagnostic procedure, buried in the Service Manual somewhere, along with the three buttons to push on your climate control panel to force an immediate outside temperature update.

CCrane65

Ah, the service manual. I have an old version of GM SPO but as I recall it stops at 2005. I'm down to 1 car that I can still use it for and that's my '05 Grand Prix GXP.

Going to need to purchase a CD or something for the C6.

Thanks Gearhead Jim.

cc

owc6

It is. It's called the service only mode. It's basically the same as the "on" on a keyed ignition. Don't count on it timing out and turning off like the Acc mode, so a dead battery is possible.

CCrane65

I searched the 2008 owner's manual for service only mode but it was not found so I searched for all instances of oil life until I found the reset procedure. I does not say anything about putting the system into "on but engine not running". It just says to press the trip button until oil life percentage is displayed then press reset for 2 seconds.

At any rate, I now know 2 ways to reset the oil life monitor.

Thanks again for all the info.

cc

godzilladude

Just to do it one more time:

Hold down the bottom of the start button for five seconds, and the car comes alive but doesn't start;

Push the "TRIP" button a few times, to get to oil life (had to hunt around for that);

Push and hold down the "RESET" button for a few second;

And POOF, back to 100%!