Engine Oil Life Remaining

The engine control module (ECM) sends the oil life remaining percentage to the instrument panel module (IPM) via GMLAN message. The instrument panel cluster receives a GMLAN message from the IPM indicating the engine oil life remaining. The driver information center (DIC) displays the current percentage of the GM Oil Life System as determined by the ECM. When the oil life remaining percentage drops below 5 percent, the DIC displays CHANGE ENGINE OIL SOON. When the engine oil is changed, reset the GM Oil Life System. Press and hold the RESET button on the DIC switch for at least 3 seconds until the DIC displays 100 percent.