Chevrolet 2010 Cobalt, Owner'S Manual

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3. At the wall, measure from the ground upward (A) to
the recorded distance from Step 2 and mark it.
4. Draw or tape a horizontal line (B) on the wall the
width of the vehicle at the height of the mark in
Step 3.
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.
5. Turn on the low-beam headlamps and place a
piece of cardboard 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.
6. Locate the vertical headlamp aiming screws, which
are under the hood near each headlamp assembly.
The adjustment screw can be turned with a 6 mm
socket wrench.
7. 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.
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