GM Service Manual Online
For 1990-2009 cars only

GM Oil Life System Resetting Gasoline Engine

When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A CHANGE ENGINE OIL light will come on. Change the engine oil as soon as possible within the next 600 miles (1 000 km). It is possible that, if driving under the best conditions, the oil life system may 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.

If the system is ever reset accidentally, change the engine oil at 3,000 miles (5 000 km) since last oil change.

To reset the CHANGE ENGINE OIL light, do the following:

  1. Turn the ignition key to RUN with the engine off.
  2. Fully press and release the accelerator pedal slowly three times within 10 seconds.
  3. Turn the key to OFF.

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

GM Oil Life System Resetting DURAMAX Diesel

When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A CHANGE ENGINE OIL light will come on. Change the engine oil as soon as possible within the next 600 miles (1 000 km). It is possible that, if driving under the best conditions, the oil life system may 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.

If the system is ever reset accidentally, change the engine oil at 3,000 miles (5 000 km) since last oil change.

To reset the CHANGE ENGINE OIL light, do the following:

  1. Turn the ignition key to RUN with the engine off.
  2. Fully press and release the accelerator pedal slowly three times within 10 seconds.
  3. Turn the key to OFF.

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

GM Oil Life System Resetting Caterpillar Diesel Engine

To reset the Engine Oil Life System, do the following:

  1. Turn the ignition key to RUN with the engine off.
  2. Fully apply and hold the brake pedal while you fully press and release the accelerator pedal, pausing slightly at each press and each release, three times within five seconds.
  3. Turn the key to OFF.

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