2006 Pontiac GTO Owner's Manual - Page 234

To adjust the vertical aim on the headlamps, do the following: 1. Open the hood. See Hood Release on page 5-11 for more information. 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. 2. Find the aim dot on the lens of the low-beam headlamp. 3. Measure the distance from the ground to the aim dot on the low-beam headlamp. Record the distance. 4. At the wall or other flat surface, measure from the ground upward the recorded distance from Step 2 and mark it. 5. Draw or tape a horizontal line the width of the vehicle at the wall or other flat surface where it was marked it Step 4. 6. 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. 7. Locate the vertical headlamp aiming screws, which are under the hood near each headlamp assembly. The adjustment screw can be turned with a No. 2 Phillips head screwdriver. 5-44