2003 Pontiac Montana Owner's Manual - Page 430

Scheduled Maintenance The services shown this schedule up to 100,000 miles in (166 000 km) shouldbe repeated after 100,000 miles (166 000 km) atthe same intervals for the life of this vehicle. The services shown at 150,000 miles (240 000 km) should be repeated at the same interval 000 after 150,000 miles (240 km) forthe life of this vehicle. See Pad B: Owner Checks and Services on page 6-9 and Part C: Periodic Maintenance Inspections on page 6- 14. Engine Oil and Chassis Lubrication Scheduled Maintenance Change engine oil and filter as indicated by the GM Oil Life System (or every 12 months, whichever occurs first). Reset the 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. 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 systev must be reset. It is also important to check your oil level. regularly and keep it at the proper ~~~~ Footnotes The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warrantyor limit recall liability prior to the completion of the vehicle 's useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. t + A good time to checkyour brakes is during tire rotation. See Brake System Inspection on page 6- 15. .~ 6-5