2003 Buick Century Owner's Manual - Page 318

Scheduled Maintenance The services shown in this schedule up to 100,000 miles (166 000 km) should be repeated after 100,000 miles (166 000 km) at the 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 after 150,000 miles (240 000 km) for the life of this vehicle. See Part 6: Owner Checks and Services on page6- 10 and Part C: Periodic Maintenance Inspections on page 6-14. @ Whenever the tires are rotated, the Tire Inflation Monitor System must be reset. + A good time to check your brakes is during tire rotation. See Brake System Inspection on page 6-15. Engine Oil Scheduled Maintenance Change engine oil and filter as indicated by the GM Oil Life SystemTM every 12 months, (or 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. Footnotes The L1-S E.nvir~r?men!~! Protectim Agmcy =,r the California Air ResourcesBoard has determined that the failure to perform this maintenance item will not nullify the emission warranty or 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 ??.;?tE?,ll?Cf? be reccrece. t 6-5