2008 Pontiac Grand Prix Owner's Manual - Page 322

Headlamp aiming is done with the low-beam headlamps. The high-beam headlamps will be correctly aimed if the low-beam headlamps are aimed properly. To adjust the vertical aim, do the following: 4. At the wall measure from the ground upward (A) to the recorded distance from Step 3 and mark it. 5. Draw or tape a horizontal line (B) on the wall the width of the vehicle at the height of the mark in 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. 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. 1. Open the hood. See Hood Release on page 5-11 for more information. Find the aim dot on the lens of the low-beam lamp. 2. Locate the aim dot on the lens of the low-beam headlamp. 3. Measure the distance from the ground to the aim dot on the lamp. Record the distance. 5-52