2002 Cadillac DeVille Owner's Manual - Page 196

Oil Life Indicator To see the display, press the INFO button several times until ENGINE OIL LIFE appears. If you see 99% ENGINE OIL LIFE, 99 percent of your current oil life remains. The DIC may display a CHANGE ENGINE OIL message. Always keep a written record of the mileage and date when you changed your oil. For more information, see "Maintenance Schedule" in the Index. If you see CHANGE ENGINE OIL, it means the oil life is gone and you should change the oil right away. The system doesn't check how much oil you have, so you'll still have to check for that. To see how, see "Engine Oil" in the Index. When the oil is changed, you'll need to reset the system. See "Oil Life Indicator, How to Reset" in the Index. This feature lets you know when to change the engine oil. It's based on the engine oil temperatures and your driving patterns. 2-128