2003 GMC Envoy Owner's Manual - Page 314

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. 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 or! 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 service station or a local recycling center for help. How to Reset the CHANGE ENG OIL Light The GM Oil Life System calculates when to change your engine oil and filter based on vehicle use. Anytime your oil is changed, reset system so it can calculate when the the next oil change is required. If a situation occurs where you change youroil prior to a CHANGE ENG OIL light being turned on, reset thesystem. To reset the CHANGE ENG OIL light, do the following: 1 . Turn the ignition key to RUN with the engine off. 2. Fully press and release the accelerator pedal three times within five seconds. For vehicles with the Driver Information Center, see Driver Information Center (DIC) on page 3-50 to reset the system. 5-19