Low Fuel Warning Light
The Bulb Check: Low Fuel Warning Light
This indicator has one function, and that is to warn drivers of low fuel level. The distance you can drive with low fuel will vary between different vehicles, but typically there will be one to two gallons left in the tank when this warning light comes on. So if your vehicle get 20 miles to the gallon and you have 2 gallons left, you can figure you have just under 40 miles left to drive. The fuel pump will not suck every last drop out of the tank.
What to Do: Hill Descent Control Warning Light
Try and not let the vehicle run out of fuel. One it can be dangerous depending on your location at the time the vehicle dies. You can cause damage to your fuel pump running it dry. There is also the possibililty of not getting the vehicle started again without hassle. Sometimes when the fuel system is run dry, it will get air in the lines and injectors. This will require bleeding the air out of the lines to get it to start again. It isn't always the case but a possibility.