Buick LaCrosse 2011 Owner's Manual page 344

10-32 Vehicle Care
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.
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. Turn on the low-beam
headlamps and place a
piece of cardboard or equivalent
in front of the headlamp not
being adjusted. This allows
only the beam of light from
the headlamp being adjusted
to be seen on the flat surface.
Base
I n f o r ma t i o n P r o v i d e d b y :
Uplevel
7. Locate the vertical headlamp
aiming screw, which are under
the hood near each headlamp
assembly.
8. Turn the vertical aiming
screw until the headlamp
beam is aimed to the horizontal
tape line. Turn it clockwise or
counterclockwise to raise or
lower the angle of the beam.