Chevrolet Caprice 2011 Owner's Manual page 249

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. Do not place it directly
on the headlamp. This allows
only the beam of light from the
headlamp being adjusted to
be seen on the flat surface.
Driver Side Shown,
Passenger Side Similar
7. Locate the vertical headlamp
aiming screws, which are under
the hood near each headlamp
assembly.
Vehicle Care
The adjustment screw can be
turned with a 6 mm socket
wrench.
8. Turn the vertical aiming screw
clockwise or counterclockwise
until the headlamp beam is
aimed to the horizontal tape line.
9. Make sure that the light
from the headlamp is positioned
at the bottom edge of the
horizontal tape line. The lamp
on the left (A) shows the correct
headlamp aim. The lamp on the
right (B) shows the incorrect
headlamp aim.
10. Repeat Steps 7 through 9 for
the opposite headlamp.
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