2003 Buick Rendezvous Owner's Manual - Page 328

When to Change Engine Oil (GM Oil Life SystemTM) 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. A change engine oil message 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 , iu i sii is* -l be l se e I ~i-l-,pui"L&i-li ui; tu c;i-lec;k yuuiregularly 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 ...lLa"...-"c l +LA oil is charged. w lcllcv Lllt: How to Reset the Change Engine Oil Message The GM Oil Life SystemTMcalculates when to change your engine oil and filter based on vehicle use. Anytime your oil is changed, reset the system so it can calculate when the next oil change is required. If a situation occurs where you change your oil prior to a being turned on, reset the system. If your vehicle does not have the optional Driver Information Center (DIC), do the following: 1. With the ignition key in ON but the engine off, fully push and release the acelerator pedal slowly three times within five seconds. 2. Turn the key COFF. I! If the CHANGE ENGINE OIL message comes back on, the engine oil life monitor has not reset. Repeat the procedure. If your vehicle has the optional DIC, do the following: 1. Turn the ignition to ON with the engine off. 2. Press ine iviGZIE buiion uniii ine EiZ reaas G i i LIFE LEFT/HOLD SET TO RESET. 3. Press and hold the SET button until 100% is displayed. You will hear three chimes and the CHANGE ENGINE OIL message wi!! go off- If the CHANGE ENGINE OIL message comes back on, the monitor has not reset. Repeat the procedure. 5-17