Chevrolet 2001 Impala Owner's Manual page 164

Low Brake Fluid
United States
This message will be displayed when your vehicle has a
brake problem. The brake system warning light will also
be illuminated.
If this message appears, the brakes aren't working
properly. You should have your vehicle serviced
immediately. See "Brake System Warning Light" in
the Index for more information.
2-94
Low Fuel
Canada
This message is displayed when your vehicle is low on
fuel. Four chimes will also sound.
Refer to the fuel gage for a better indication of the
amount of fuel remaining in the fuel tank.
United States Canada