Cadillac 2012 CTS-V Owner's Manual page 357

2. Locate the aim dot on the lens of
the low beam headlamp.
3. Record the distance from the
ground to the aim dot on the
low beam headlamp.
4. At a 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)
the width of the vehicle at the
wall where it was marked 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.