Change Engine Oil
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
The IPC illuminates the CHANGE ENGINE OIL indicator in the message center when the powertrain control module (PCM) determines that the engine oil should be changed. The IPC receives a class 2 message from the PCM indicating the remaining oil life percent. One the oil is changed, perform the engine oil monitor reset procedure in order to clear the CHANGE ENGINE OIL indicator.