2008 Chevrolet Cobalt Owner's Manual - Page 148

Charging System Light This light will come on briefly when you turn on the ignition, and the engine is not running, as a check to show it is working. Then it should go out when the engine is started. If the light stays on, or comes on while you are driving, you may have a problem with the electrical charging system. Have it checked by your dealer/retailer. Driving while this light is on could drain your battery. If you must drive a short distance with the light on, be sure to turn off all accessories, such as the radio and air conditioner. Up-Shift Light Your vehicle may have an up-shift light. When this light comes on, you should shift to the next higher gear if weather, road, and traffic conditions allow you to. See Manual Transmission Operation on page 2-30 for more information. 3-30