2001 Buick Regal Owner's Manual - Page 149

Low Fuel Light Driver Information Center (Option) The Driver Information Center (DIC), located below the tachometer on the instrument panel cluster, gives you important safety and maintenance facts. When you turn the ignition on, the entire center lights up for just a few seconds. 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. 3800 V6 Supercharged Engine 2-80