The engine control module (ECM) determines when the engine oil should be changed and calculates the oil life in percent. The ECM sends this information via high speed GMLAN to the body control module (BCM). The instrument panel cluster (IPC) receives this information from the BCM through low speed GMLAN and illuminates the oil level percent in the driver information center (DIC). The IPC will illuminate the CHANGE ENGINE OIL message when the oil needs to be changed.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Displays and Gages Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

1. Verify the scan tool Engine Oil Life Remaining parameter is greater than 0 percent.

⇒	If equal to 0 percent, reset the engine oil life.

2. If the percent value is normal, replace the IPC.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.