How do you change headlight bulb on Buick Lacrosse?

To change the headlight bulb on a Buick Lacrosse, first, open the hood and locate the back of the headlight assembly. Disconnect the electrical connector by pressing the tab and pulling it off the bulb. Twist the bulb socket counterclockwise to remove the old bulb, then insert the new bulb and twist it clockwise to secure it. Reconnect the electrical connector and test the new bulb before closing the hood.