GM Service Manual Online
For 1990-2009 cars only

Resetting Procedure

To reset the engine oil life monitor:

  1. Turn the ignition to ON without starting the engine.
  2. Fully press and release the accelerator pedal three times within five seconds.
  3. If the CHG OIL SOON indicator flashes two times, the system is resetting.

  4. Turn the key to OFF, then start the vehicle. If the CHG OIL SOON light comes back on, the system has not reset, repeat the procedure