Indicator/Warning Message Description and Operation

Indicator/Warning Message Description and Operation















CHANGE OIL SOON

The driver information center (DIC) displays the CHANGE ENGINE OIL message when the powertrain control module (PCM)/engine control module (ECM) determines that the engine oil life is 0 percent. The PCM/ECM sends a GMLAN serial data message to the BCM to request the DIC to display the CHANGE ENGINE OIL message. After the oil is changed, reset the engine oil monitor. Refer to GM Oil Life System Resetting.

ENGINE OIL PRESSURE

The instrument panel cluster (IPC) illuminates the engine oil pressure (EOP) indicator when the powertrain control module (PCM)/engine control module (ECM) detects the EOP is low from the EOP sensor/switch. The PCM/ECM sends a GMLAN serial data message to the body control module (BCM) indicating a low EOP condition. The IPC receives a GMLAN message from the BCM requesting the EOP indicator.

ICE POSSIBLE

The driver information center (DIC) displays the ICE POSSIBLE message when the outside air temperature drops below 2°C (36°F). When the temperature rises above 5.5°C (42°F), the ICE POSSIBLE message turns OFF. The DIC receives a GMLAN message indicating the outside air temperature from the body control module (BCM).

LOW FUEL

The driver information center (DIC) displays the low fuel indicator as determined by the powertrain control module (PCM)/engine control module (ECM). The PCM/ECM monitors the fuel level sensor signal and will request the LOW FUEL message from the body control module (BCM) when the fuel level is less than 14 percent. The DIC receives a GMLAN message from the BCM requesting display of the LOW FUEL message.

LOW OIL LEVEL

The driver information center (DIC) displays the LOW OIL LEVEL message when the powertrain control module (PCM)/engine control module (ECM) detects a low oil level condition from the engine oil level sensor/switch. The PCM/ECM sends a GMLAN serial data message to the body control module (BCM) requesting a low oil level message. The DIC receives a GMLAN message from the BCM requesting the engine oil level message.

SERVICE VEHICLE SOON

The driver information center (DIC) displays the SERVICE VEHICLE SOON message when the following conditions exists:

* The body control module (BCM) detects certain malfunctions that are not emissions related. The DIC receives a GMLAN message requesting the display of SERVICE VEHICLE SOON from the BCM.
* The DIC detects a loss of GMLAN communications with the BCM.

UPSHIFT INDICATOR

The Upshift indicator notifies the driver when to shift the transmission. The instrument panel cluster (IPC) illuminates the Upshift indicator as determined by the powertrain control module (PCM)/engine control module (ECM). The IPC receives a GMLAN serial data message from the body control module (BCM) requesting illumination of the indicator.