This light comes on briefly
when the ignition is turned
on, 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 driving, there may be a problem with the electrical charging system.
Have it checked by your dealer/retailer. Driving while this light is on could drain the battery.
If a short distance must be driven with the light on, turn off all accessories, such as the radio and air conditioner.
Chevrolet Cobalt Owners Manual. Back-Up Lamps (Coupe)
To replace a back-up lamp bulb:
1. Open the trunk. See Trunk.
2. Locate the back-up lamp bulb assembly in the
trunk lid.
3. Turn the bulb socket counterclockwise and pull it
out of the lamp assembly.
On vehicles that have a back-up lamp cover, first
remove it by pressing the tab at the to ...