How do you replace a rear turn signal bulb on a 2012 Buick Regal?

To replace the rear turn signal bulb on a 2012 Buick Regal, start by opening the trunk and removing the trunk liner or access panel to reach the tail light assembly. Locate the tail light housing and twist the bulb socket counterclockwise to remove it. Pull out the old bulb and insert a new bulb, then reassemble the socket and the tail light housing. Finally, test the new bulb to ensure it’s functioning correctly before closing the trunk.