Fuel Gauge Malfunctioning
WARNING: This page is about a different car, the 1998 Oldsmobile Cutlass and 1998 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
See DTC P0462, DTC P0463, or any loss of SPI DTCs. Refer to BFC DTC DEFINITIONS under SELF-DIAGNOSTIC SYSTEM. Repair as necessary.