Fuel Gage

The instrument panel cluster (IPC) displays the fuel level as determined by the engine control module (ECM)/powertrain control module (PCM). The IPC receives a GMLAN message from the ECM/PCM indicating the fuel level percent. The fuel gage defaults to empty if:

• The ECM/PCM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of GMLAN communications with the ECM/PCM.
• The IPC detects a loss of GMLAN communications with the body control module (BCM).

When the fuel level is less than a pre-determined value, the low fuel message is displayed in the DIC.