When the LOW FUEL message is displayed, you may have less than 1.5 gallons (5.5 liters) of fuel left. You should refuel your vehicle immediately.
As a bulb check, the light will come on when the ignition key is turned on, and then go out in about 3 seconds.
If the fuel gage system detects a problem, the "LOW FUEL" warning light may stay on even after refueling. If this occurs, see your Saturn retailer for service.