Fuel Level Sensor (Sender Gauge) Inspection
WARNING: This page is about a different car, the 2004 Suzuki XL-7 and 2004 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Remove fuel pump assembly referring to "Fuel Pump Removal and Installation:" .
Use an ohmmeter to confirm that resistance of sender gauge unit changes with change of float position.
If measured value is out of specification, replace fuel sender gauge.