2002 Buick LeSabre Owner's Manual - Page 310

Headlamp Vertical Aiming NOTICE: Horizontal aiming must be performed before making any adjustments to the vertical aim. Adjusting the vertical aim first will result in an incorrect headlamp aim. 1. Find the aim dot on the lens of the low beam lamps. 3. At the wall or other flat surface, measure from the ground upward the recorded distance from step 2 and draw or tape a horizontal line the width of the vehicle. 4. Turn on the low-beam headlamps and place a piece of cardboard or equivalent in front of the headlamp not being aimed. This should allow only the beam of light from the headlamp being aimed to be seen on the flat surface. 2. Measure the distance from the ground to the aim dot on each lamp; if left low beam, subtract two inches. Record this distance. 6-38