In addition to notifying NHTSA (or Transport Canada) in a situation like this, please notify General Motors.
Call 1-800-222-1020, or write:
Chevrolet Motor Division
Chevrolet Customer Assistance Center
P.O. Box 33170
Detroit, MI 48232-5170
In Canada, call 1-800-263-3777 (English) or
1-800-263-7854 (French), or write:
General Motors of Canada Limited
Customer Communication Centre, CA1-163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
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 ...