2003 Pontiac Bonneville Owner's Manual - Page 156

Battery Warning Light If your vehicle has this feature, this light will come on briefly when you start the vehicle, as a check to show you it is working; then it should go out. Voltmeter Gage You have a voltmeter unless you have the supercharged engine. If it stays on, or comes on while you are driving, you may have a problem with the electrical charging system. Have it checked right away. Eriving while this light is on could drain your battery and result in a vehicle that may stall. If you must drive a short distance with the light on, be certain to turn off all your accessories, such as the radio and climate control system. Some instrument panel clusters with a voltmeter gage do not have a battery warning light. They have a CHECK GAGES warning to indicate a problem. On vehicles with a DIC, a CHECK CHARGE SYSTEM message will be displayed and a warning chime will sound. See DIC Warnings and Messages on page 3-60 for more information. When the ignition is running, the gage shows the condition o the charging system. Readings between the f shaded warning zones indicate the normal operating range. Readings in the shaded warning zones indicate a possible problem in the electrical system. On vehicles with the systems monitor, the CHECK GAGES light will also come on, and a warning chime will sound if there is a problem in the electrical system. Have your vehicle serviced immediately. 3-41