Oil Life Remaining
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Oil life left % is based on the information the IPC receives via class 2 from the PCM. The DIC displays the current % of the GM Oil Life System. When the oil needs changing the change engine oil indicator in the message center turns on. When the engine oil is changed the changed engine oil indicator needs to be cleared out of the message center and the oil life left needs to be reset. While in this mode press and hold the Reset button until 100% is displayed.