2003 Buick Century Owner's Manual - Page 234

How to Reset the CHANGE OIL SOON Light The GM Oil Life SystemTM calculates 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 CHANGE OIL SOON light being turned on, reset the system. After changing the engine oil, reset the system by performing the following steps: 1. With the engine off, turn the ignition key to RUN. 2. Fully push and release the accelerator pedal slowly tnree times within five seconds. If the CHANGE OIL SOON light flashes, the system is resetting. What to Do with Used Oil Used engine oil contains certain elements that may be unhealthy for your skin and could even cause cancer. Don't let used oil stay on your skin for very long. Clean your skin and nails with soap and water, or a good hand cleaner. Wash or properly dispose of clothing or rags containing used engine oil. See the manufacturer's warnings about the use and disposal of oil products. Used oil can be a threat to the environment. If you change your own oil, be sure to drain all the oil from the filter before disposal. Never dispose of oil by putting it in the trash, pouring it on the ground, into sewers, or into streams or bodies of water. Instead, recycle it by taking it to a place that collects used oil. If you have a problem properly disposing of your used oil, ask your dealer, a sewice station or a local recycling center for help. 3. Turn the key to OFF, then start the vehicle. The oil life will change to 100 percent. If the CHANGE OIL SOON light comes back on, the system has not reset. Repeat the procedure^ 5-17