Instrument Panel, Gauges and Warning Indicators: Description and Operation

INDICATORS







DIC WARNING MESSAGES

CHANGE OIL SOON
The instrument panel cluster (IPC) illuminates the CHANGE OIL SOON message in the message center when the engine control module (ECM)/powertrain control module (PCM) determines that the engine oil needs to changed. The ECM/PCM sends a class 2 message to the IPC requesting warning message illumination. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System - Resetting in Maintenance and Lubrication.

LOW OIL LEVEL
The instrument panel cluster (IPC) illuminates the LOW OIL LEVEL message in the message center if the powertrain control module (PCM) detects low engine oil level. The IPC receives a class 2 message requesting illumination from the ECM/PCM.

LOW ENGINE OIL PRESSURE
The instrument panel cluster (IPC) illuminates the LOW ENGINE OIL PRESSURE indicator in the IPC when the engine control module (ECM)/powertrain control module (PCM) detects low engine oil pressure, and the signal circuit is low. The IPC receives a class 2 message requesting warning message illumination from the PCM.

LOW FUEL
The instrument panel cluster (IPC) illuminates the LOW FUEL message in the message center and the LOW FUEL indicator in the IPC when the powertrain control module (PCM) determines that the fuel level is less than 8.2 percent. The IPC receives a class 2 message indicating the fuel level from the ECM/PCM.

LOW OIL PRESSURE
The instrument panel cluster (IPC) illuminates the LOW OIL PRESSURE message in the message center when the engine control module (ECM)/powertrain control module (PCM) detects low engine oil pressure, and the signal circuit is low. The IPC receives a class 2 message requesting warning message illumination from the ECM/PCM.

SERVICE VEHICLE SOON
The driver information center (DIC) illuminates the SERVICE VEHICLE SOON indicator when the engine control module (ECM)/powertrain control module (PCM) detects certain malfunctions that are not related to the emissions system. The DIC receives a class 2 message requesting warning message illumination from the ECM/PCM.