Sierra 2500 Denali 2WD V8-6.0L (2011)
Oil Change Reminder Lamp: Service and Repair
Service Manual
GM Oil Life System Resetting
When to Change Engine Oil
This vehicle has a computer system that indicates 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 is indicated can vary considerably. For the oil life system to work
properly, the system must be reset every time the oil is changed.
On some vehicles, when the system has calculated that oil life has been diminished, a CHANGE ENGINE OIL SOON message comes on to indicate that
an oil change is necessary. Change the oil as soon as possible within the next 1 000 km (600 miles). It is possible that, if driving under the best
conditions, the oil life system might not indicate that an oil change is necessary for over a year. However, the engine oil and filter must be changed at
least once a year and at this time the system must be reset. For vehicles without the CHANGE ENGINE OIL SOON message, an oil change is needed
when the OIL LIFE REMAINING percentage is near 0 percent. Your dealer has trained service people who will perform this work using genuine parts
and reset the system. It is also important to check the oil regularly and keep it at the proper level.
If the system is ever reset accidentally, the oil must be changed at 5 000 km (3,000 miles) since the last oil change. Remember to reset the oil life system
whenever the oil is changed.
How to Reset the Engine Oil Life System
The Engine Oil Life System calculates when to change the engine oil and filter based on vehicle use. Whenever the oil is changed, reset the system so it
can calculate when the next oil change is required. If a situation occurs where the oil is changed prior to a CHANGE ENGINE OIL SOON message
coming on, reset the system.
Always reset the engine oil life to 100 percent after every oil change. It will not reset itself. To reset the Engine Oil Life System on most vehicles:
1. Display the OIL LIFE REMAINING on the DIC. If the vehicle does not have DIC buttons, the vehicle must be in P (Park) to access this display.
2. Press and hold the SET/RESET button on the DIC, or the trip odometer reset stem if the vehicle does not have DIC buttons, for more than five
seconds. The oil life will change to 100 percent.
On all vehicles, the Engine Oil Life System can be reset as follows:
1. Turn the ignition to ON/RUN with the engine off.
2. Fully press the accelerator pedal slowly three times within five seconds.
3. Display the OIL LIFE REMAINING on the DIC. If the display shows 100 percent, the system is reset.
If the vehicle has a CHANGE ENGINE OIL SOON message and it comes back on when the vehicle is started and/or the OIL LIFE REMAINING is near
0 percent, the Engine Oil Life System has not reset. Repeat the procedure.
