C 2500 Suburban 2WD V8-6.0L VIN U (2002)
Fuel Gauge: Description and Operation
FUEL GAGE
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel
gage defaults to empty if:
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The PCM detects a malfunction in the fuel level sensor circuit.
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The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Reviewing the fuel system description and Operation will further explain how the system functions.
