How do you change replace headlight bulb on 2006 Chevy Cobalt and what headlight bulbs does it take?

To replace the headlight bulb on a 2006 Chevy Cobalt, first, open the hood and locate the headlight assembly. Remove the plastic cover and then twist the bulb socket counterclockwise to release it. Pull out the old bulb, insert the new bulb (typically a 9006 for low beams and 9005 for high beams), making sure not to touch the glass part, then reassemble by reversing the steps. Finally, test the headlights to ensure they are working properly.