2001 Chevrolet Monte Carlo Owner's Manual - Page 151

Voltmeter Gage (3800 V6 Engine) You can read battery voltage on the voltmeter gage. Brake System Warning Light Your vehicle's hydraulic brake system is divided into two parts. If one part isn't working, the other part can still work and stop you. For good braking, though, you need both parts working well. If the warning light comes on, there is a brake problem. The LOW BRAKE FLUID message in the message center will also appear when there is a brake problem. See "Low Brake Fluid Message" in the Index. Have your brake system inspected right away. If the gage reads less than 12 volts or more than 16 volts while the engine is running, and it stays there, you may have a problem with the electrical charging system. Also, when your gage reads less than 11 volts or more than 16 volts, your battery life indicator will be illuminated in the message center. For more information see "Battery Life Indicator" in the Index. United States Canada This light should come on briefly when you turn the ignition key to ON. If it doesn't come on then, have it fixed so it will be ready to warn you if there's a problem. 2-79