2003 Buick Regal Owner's Manual - Page 148

Here are four things that some owners ask about. All these things are normal and do not indicate that anything is wrong with the fuel gage: At the gas station, the pump shuts off before the gage reads full. It takes more (or less) fuel to fill up than the gage reads. For example, the gage reads half full, but it took more (or less) than half of the tank's capacity to fill it. The gage pointer may move while cornering, braking or speeding up. The gage may not indicate empty when the ignition is turned off. Low Fuel Warning Light United States Canada If your fuel is low, a circular light on your instrument panel cluster will come on and stay on and a chime will sound periodically until you add fuel. It will also come on for a few seconds when you first turn on the ignition as a check to show you it's working. If it doesn't come on then, have it fixed. 3-43