Engine Oil Life SystemWhen to Change Engine OilYour vehicle has a computer system that lets youknow when to change the engine oil and filter.This is based on engine revolutions and enginetemperature, and not on mileage. Based on drivingconditions, the mileage at which an oil changewill be indicated can vary considerably. For the oillife system to work properly, you must reset thesystem every time the oil is changed.When the system has calculated that oil life hasbeen diminished, it will indicate that an oil changeis necessary. A change engine oil message in theDriver Information Center (DIC) will come on.Change your oil as soon as possible within the next600 miles (1 000 km). It is possible that, if you aredriving under the best conditions, the oil life systemmay not indicate that an oil change is necessary forover a year. However, your engine oil and filtermust be changed at least once a year and at thistime the system must be reset. Your dealer hasGM-trained service people who will perform thiswork using genuine GM parts and reset the system.It is also important to check your oil regularly andkeep it at the proper level.If the system is ever reset accidentally, youmust change your oil at 3,000 miles (5 000 km)since your last oil change. Remember to reset theoil life system whenever the oil is changed.How to Reset the Engine Oil LifeSystem and the Oil Life IndicatorThe Engine Oil Life System calculates when tochange your engine oil and filter based on vehicleuse. Anytime your oil is changed, reset the systemso it can calculate when the next oil change isrequired. If a situation occurs where you changeyour oil prior to a change engine oil message in theDIC being turned on, reset the system.350
