How do you replace rear turn signal bulb on 2007 Buick Lacrosse?

To replace the rear turn signal bulb on a 2007 Buick Lacrosse, first, open the trunk and locate the access panel or cover on the side of the tail light assembly. Remove the screws or clips securing the panel, then pull it away to expose the tail light assembly. Twist the bulb socket counterclockwise to remove it, replace the old bulb with a new one, and reassemble everything by reversing the steps. Ensure the new bulb is securely in place before closing the access panel.