To replace one of these bulbs:
1. Remove the two screws holding each of the license plate lamps.
2. Turn and pull the license plate lamp toward you through the opening.
3. Turn the bulb socket counterclockwise and pull the bulb straight out of the socket.
4. Install the new bulb.
5. Push the bulb straight into the socket and turn clockwise to reinstall.
6. Push and turn the license plate lamp away from you through the opening.
7. Reinstall the two screws holding the license plate lamp.
Chevrolet Cobalt Owners Manual. Add-On Electrical Equipment
Notice: Do not add anything electrical to the
vehicle unless you check with your dealer/retailer
first. Some electrical equipment can damage the
vehicle and the damage would not be covered by
the vehicle's warranty. Some add-on electrical
equipment can keep other components from
working as the ...