Cadillac ESCALADE EXT 2004 Owner's Manual page 364

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 the vertical aiming screw (V) until the
headlamp beam is aimed to the horizontal tape line.
The top edge of the cut-off should be positioned
at the bottom edge of the horizontal tape line.
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6. Repeat steps 4 and 5 for the opposite headlamp.