How do you Aim headlights on a 2006 Buick century?

To aim the headlights on a 2006 Buick Century, park the vehicle on a level surface about 25 feet from a wall. Measure the height of the headlight center from the ground and mark this height on the wall. Turn on the headlights and adjust the vertical aim using the adjustment screws located on the headlight assembly until the top of the light beam is aligned with the mark on the wall. Ensure the headlights are aimed properly to avoid blinding other drivers while providing optimal visibility.