2005 Buick LeSabre Owner's Manual - Page 287

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. To adjust the vertical aim, do the following: 1. Follow the steps listed under Headlamp Horizontal Aiming on page 5-46 first before adjusting the vertical aim if horizontal aiming needs to be performed. 4. At the wall or other flat surface, measure from the ground upward the recorded distance from Step 3 and draw or tape a horizontal line the width of the vehicle. 5. Turn on the low-beam headlamps. Notice: Do not cover a headlamp to improve beam cut-off when aiming. Covering a headlamp may cause excessive heat build-up which may cause damage to the headlamp. 6. 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. 5-47 2. Find the aim dot on the lens of the low-beam lamps. 3. Measure the distance from the ground to the aim dot on each lamp; if left low beam, subtract 2 inches (5 cm). Record this distance.