How do you adjust headlights on a 2006 Buick Lacrosse?

To adjust the headlights on a 2006 Buick Lacrosse, first park the vehicle on a level surface about 25 feet from a wall. Turn on the headlights and mark the center of the beam on the wall with tape. Use a screwdriver to adjust the vertical and horizontal alignment screws located on the headlight assembly until the beams are aligned with the marked spots. Ensure both headlights are adjusted to the same level for optimal visibility.