• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
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.
Displays and Gages Connector End Views
⇒ | If equal to 0 percent, reset the engine oil life. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for PCM or IPC replacement, setup, and programming |