Under federal law, cars are required to have either a direct or indirect tire pressure monitoring system (TPMS) which tells the driver when the tire pressure is low. While indirect systems are less common, they are used in the Chevrolet Impala due to their reduced cost compared to direct systems. Since these systems do not monitor air pressure in tires (rather, the difference between tires), they won't alert you if your tires lose air at the same rate. Resetting the TPM system is, therefore, necessary if your tires haven't been recently refilled or replaced.
Insert your key into the ignition and turn the car battery on but do not crank the engine off. Turn on your car radio.
Depress the "DISP" button for several seconds until "SETTINGS" appears on the screen.
Scroll through the settings options with the "SEEK" buttons and select "TIRE MON." Press "NEXT" on the radio controls until the "RESET" option appears then press "DISP."
Scroll to the "DONE" option using the "SEEK" controls and press the "DISP" button again.
Turn the key in the ignition to power on the battery without cranking the engine.
Locate the parking lamp switch near the steering wheel.
Turn the lamps on and off three times within five seconds to reset the TPM system.
