Take the screws out (or star shocket).
Remove you bulb and replace.
How do you change the tail light on a 2005 Colbalt?
Look inside the trunk or read the owner's manual.
How do you change the tail light on a 2005 Colbalt?
If you cobalt is under 36k miles take it to your local chevy dealership and the will replace the bulb for free.
