Page 408 of 520
A. Low-Beam Headlamp
B. High-Beam Headlamp
2. Pull the headlamp assembly out.
3. Unplug the electrical connector.
4. Turn the old bulb counterclockwise and remove it
from the headlamp assembly.
5. Put the new bulb into the assembly and turn it
clockwise until it is tight. Use care not to touch
the bulb with yourfingers or hands.
6. Plug in the electrical connector.
7. Put the headlamp assembly back into the vehicle.
Install and tighten the two pins.
Front Turn Signal, Sidemarker and
Daytime Running Lamps
A. Sidemarker Lamp
B. Retainer Clip
C. Front Turn Signal Lamp
D. Daytime Running Lamp
1. Remove the headlamp assembly as mentioned
previously.
2. Press the retainer clip, located behind the turn
signal housing, towards the outside of the vehicle.
3. Pull the turn signal housing out from the vehicle.
4. Press the locking release lever, turn the bulb socket
counterclockwise and remove it from the turn signal
housing.
5-54
2003 - Yukon/Yukon XL
Page 409 of 520

5. Remove the old bulb from the bulb socket.
6. Put the new bulb into the bulb socket. Use care not
to touch the bulb with yourfingers or hands.
7. Put the bulb socket into the turn signal housing and
turn it clockwise until it locks.
8. Put the turn signal housing back onto the vehicle
placing the hook and posts on the inner side into
the alignment holesfirst and then the outer side into
the retainer bracket. Push until you hear a click.
9. Put the headlamp assembly back into the vehicle.
Side Identi cation Marker Lamps
1. To expose the service slot, locate the lamp gasket
near the rear wheel, and pull back the edge.
2. Using aflat tool, push into the slot to release the
lamp housing.
3. Pull the housing out to expose the wiring harness
and connector.4. Unplug the lamp assembly harness from the
housing.
5. Unplug the lamp.
6. Put in a new lamp and snap it into the housing.
7. Reinstall the lamp housing.
Roof Marker Lamps
1. Remove the
two screws and
lift off the lens.
5-55
2003 - Yukon/Yukon XL
Page 410 of 520
2. Remove the six screws on the center roof marker
lamps.
3. Turn the old bulb counterclockwise to remove it
from the socket.4. Put a new bulb into the
socket and turn
clockwise until it locks
in place.
5-56
2003 - Yukon/Yukon XL
Page 412 of 520
1. Use a tool to remove
the two screws from
the lamp assembly.
2. Remove the lamp assembly.
3. Press the release tab and turn the bulb socket
counterclockwise to remove it from the taillamp
housing.4. Pull the old bulb
straight out from the
socket.
5. Press a new bulb into the socket, insert the socket
into the taillamp housing and turn the socket
clockwise into the taillamp housing until it clicks.
6. Reinstall the rear lamp assembly.
5-58
2003 - Yukon/Yukon XL
Page 425 of 520

A. Bottle Jack
B. Wheel Blocks
C. Wing Nut Holding
Tire Blocks
D. Mounting Bracket
E. Removable TrayF. Retaining Hook
G. Retaining Bracket
and Wing Nut
H. Tool Kit with Jack
Tools and GlovesFor Tahoe/Yukon, the equipment is located behind the
left trim panel in the rear of the vehicle. Unlatch the
release lever to open the trim panel door. Skip thefirst
step and follow the last three.
For Suburban/Yukon XL, the equipment you’ll need is
under the storage tray in the left trim panel.
1. Remove the tray to access the tools.
2. There is a wing nut used to retain the tool kit. To
remove it, turn the wing nut counterclockwise.
3. To release the bottle jack from its holder, turn the
knob on the bottle jack counterclockwise to lower
the jack head.
4. The wheel blocks and the wheel block retainer can
be removed by turning the wing nut
counterclockwise.
You’ll use the jack handle extensions and the wheel
wrench to remove the underbody-mounted spare tire. Suburban/Yukon XL
5-71
2003 - Yukon/Yukon XL
Page 427 of 520
3. Insert the hoist end
(open end) (F) of the
extension through
the hole (G) in the rear
bumper.
Be sure the hoist end of the extension connects to
the hoist shaft (E). The ribbed square end of the
extension is used to lower the spare tire.
4. Turn the wheel wrench (H) counterclockwise to
lower the spare tire to the ground. Continue to
turn the wheel wrench until the spare tire can be
pulled out from under the vehicle.
If the spare tire does not lower to the ground, the
secondary latch is engaged causing the tire
not to lower. See“Secondary Latch System”later in
this section.5. The wheel wrench has
a hook that allows you
to pull the hoist
cable towards you to
assist in reaching
the spare tire.
5-73
2003 - Yukon/Yukon XL
Page 429 of 520
1. Remove the center cap by placing the chisel end of
the wheel wrench in the slot on the wheel and
gently prying the cap out.2. Use the wheel wrench to loosen all the wheel nuts.
Turn the wheel wrench counterclockwise to loosen
the wheel nuts. Don’t remove the wheel nuts yet.
Notice:If your vehicle is equipped with
QUADRASTEER™avoid contact with tie rods and
tie rod boots when jacking the vehicle.
5-75
2003 - Yukon/Yukon XL
Page 431 of 520

Front Tire Flat:If theflat tire is on a front tire of
the vehicle, you’ll need to use the jack handle (C)
and only one jack handle extension (D). Attach
the wheel wrench to the jack handle extension.
Attach the jack handle to the jack. Position the jack
on the frame behind theflat tire where the frame
sections overlap. Turn the wheel wrench clockwise
to raise the vehicle. Raise the vehicle far enough
off the ground so there is enough room for the spare
tire to clear the ground.Rear Tire Flat:If theflat tire is on a rear tire of the
vehicle, you’ll need to use the jack handle (C) and both
jack handle extensions (D). Attach the wheel wrench
to the jack handle extensions. Attach the jack handle to
the jack. Use the jacking pad provided on the rear
axle. Turn the wheel wrench clockwise to raise
the vehicle. Raise the vehicle far enough off the ground
so there is enough room for the spare tire to clear
the ground. Front Position
Rear Position 1500
SeriesRear Position 2500
Series
5-77
2003 - Yukon/Yukon XL