Bulb Replacement; Halogen Bulbs; Taillamps, Turn Signal; Stoplamps, And Back-Up - GMC Yukon XL Denali Owner's Manual

10-34 Vehicle Care
8. 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.
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.

Bulb Replacement

For the proper type of replacement
bulbs, see Replacement Bulbs on
page 10 36.
For any bulb changing procedure
not listed in this section, contact
your dealer.

Halogen Bulbs

WARNING
Halogen bulbs have pressurized
gas inside and can burst if you
drop or scratch the bulb. You or
others could be injured. Be sure
to read and follow the instructions
on the bulb package.

Taillamps, Turn Signal,

Stoplamps, and Back-Up

Lamps

A. Stoplamp/Taillamp
B. Turn Signal/Taillamp
C. Back-up Lamp