Pontiac 2006 Grand Prix - Manual (Page 357)

It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be re-aimed.
It is possible however, to re-aim the headlamps as
described in the following procedure.
The vehicle should be properly prepared as follows:
• The vehicle should be placed so the headlamps are
25 ft. (7.6 m) from a light colored wall or other flat
surface.
• The vehicle must have all four tires on a perfectly
level surface which is level all the way to the wall
or other flat surface.
• The vehicle should be placed so it is perpendicular
to the wall or other flat surface.
• The vehicle should not have any snow, ice, or
mud on it.
• The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being done.
• The vehicle should be normally loaded with a
full tank of fuel and one person or 160 lbs (75 kg)
sitting on the driver’s seat.
• Tires should be properly inflated.
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:
1. Find the aim dot on the lens of the low-beam lamp.
2. Measure the distance from the ground to the aim
dot on the lamp. Record the distance.
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.
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