GM Service Manual Online
For 1990-2009 cars only

If the system is ever reset accidentally, you must change the engine oil at 5 000 km (3,000 miles) since 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 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 message being turned on, reset the system.

After changing the engine oil, the system must be reset as follows:

  1. Turn the ignition to RUN, with the engine OFF.
  2. Press the information and reset buttons on the Driver Information Center (DIC) at the same time to enter the personalization menu.
  3. Press the information button to scroll through the available personalization menu modes until the DIC display shows OIL LIFE RESET.
  4. Press and hold the reset button until the DIC display shows ACKNOWLEDGED. This will tell you the system has been reset.
  5. Turn the key to LOCK.

If the CHANGE ENGINE OIL message comes back on when you start the vehicle, the Engine Oil Life System has not reset. Repeat the reset procedure.