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GMC 2010 Yukon XL Denali - Page 441

GMC 2010 Yukon XL Denali
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To adjust the vertical aim:
1. Open the hood. See Hood Release on page 612
2. Locate the aim dot on the lens of the lowbeam
headlamp.
3. Record the distance from the ground to the aim dot
on the lowbeam 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) 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.
6-51

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