Oil Life Left

Oil life left percent is based on the information it receives from a class 2 message from the powertrain control module (PCM). The instrument panel cluster (IPC) displays the current percent of the GM Oil Life System in the trip odometer display. When the oil needs changing the change oil indicator in the message center turns on. When the engine oil is changed the oil life left percent needs to be reset. Press and hold the set/reset button for 3 seconds until 100 percent is displayed in the trip odometer.