Do not tow a trailer if the vehicle is equipped with a manual transmission.
Chevrolet Cobalt Owners Manual. Taillamps, Turn Signal, Stoplamps and Back-up Lamps (Sedan)
To replace one of these bulbs:
1. Open the trunk.
2. Remove the trunk trim and pull back fastener.
3. Remove the additional fastener.
4. Remove the outer two screws from the taillamp
assembly.
5. Lift up on the tab and pull the wiring harness
straight out.
6. Remove the taillamp assembly fro ...