Low Fuel
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The instrument panel cluster (IPC) displays the Low Fuel indicator when the IPC receives a class 2 message indicating the fuel level remaining from the PCM/ECM.
The instrument panel cluster (IPC) displays the LOW FUEL message in the DIC when the IPC receives a class 2 message indicating the fuel level remaining from the PCM/ECM (if equipped with uplevel IPC UH8).