K 1500 Truck 4WD V8-4.8L VIN V (2003)
Oil Change Reminder Lamp: Description and Operation
GM OIL LIFE SYSTEM
Your vehicle has a computer system that lets you know when to change the engine oil and filter. This is based on engine revolutions and engine
temperature, and not on mileage. Based on driving conditions, the mileage at which an oil change will be indicated can vary considerably. For the oil
life system to work properly, you must reset the system every time the oil is changed.
When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. Either a "CHANGE ENGINE OIL"
message in the Driver Information Center (DIC) or a CHANGE OIL indicator will come on. Change your oil as soon as possible within the next two
times you stop for fuel. It is possible that, if you are driving under the best conditions, the oil life system may not indicate that an oil change is
necessary for over a year. However, your engine oil and filter must be changed at least once a year and at this time the system must be reset. It is also
important to check your oil regularly and keep it at the proper level.
If the system is ever reset accidentally, you must change your oil at 3,000 miles (5 000 km) since your last oil change. Remember to reset the oil life
system whenever the oil is changed.
