GM Oil Life Monitoring System
The patented GM Oil Life Monitor takes the guesswork out of when to change your oil while helping protect the environment from unnecessary oil changes. By tracking the engine's revolutions and temperature, as well as driver use, the system predicts the vehicle's oil life and indicates when a change is necessary. You may even be able to save time and money by not having to get your oil changed as often. See the Owner's Manual for more information. Maintenance needs vary with different uses and driving conditions.