2005 GMC YUKON XL spare tire

Uniform Tire Quality Grading
Quality grades can be found where applicable on the
tire sidewall between tread shoulder and maximum
section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration, which grades tires by
treadwear, traction and temperature performance. (This
applies only to vehicles sold in the United States.)
The grades are molded on the sidewalls of most
passenger car tires. The Uniform Tire Quality Grading
system does not apply to deep tread, winter-type
snow tires, space-saver or temporary use spare tires,
tires with nominal rim diameters of 10 to 12 inches
(25 to 30 cm), or to some limited-production tires.
While the tires available on General Motors passenger
cars and light trucks may vary with respect to these
grades, they must also conform to federal safety
requirements and additional General Motors Tire
Performance Criteria (TPC) standards.
Treadwear
The treadwear grade is a comparative rating based on
the wear rate of the tire when tested under controlled
conditions on a specied government test course.
For example, a tire graded 150 would wear one and
a half (1.5) times as well on the government course as
a tire graded 100. The relative performance of tires
depends upon the actual conditions of their use,
however, and may depart signicantly from the norm
due to variations in driving habits, service practices and
differences in road characteristics and climate.
Traction – AA, A, B, C
The traction grades, from highest to lowest, are AA, A,
B, and C. Those grades represent the tire’s ability
to stop on wet pavement as measured under controlled
conditions on specied government test surfaces of
asphalt and concrete. A tire marked C may have poor
traction performance. Warning: The traction grade
assigned to this tire is based on straight-ahead braking
traction tests, and does not include acceleration,
cornering, hydroplaning, or peak traction characteristics.
5-70

Removing the Spare Tire and Tools
A. Retaining Bracket
and Wing Nut
B. Tool Kit and
Jack Tools
C. JackD. Wing Nut Holding
Tire Blocks
E. Wheel BlocksA. Knob
B. Removable Tray
C. Retaining Hook
D. Retaining Bracket
and Wing Nut
E. Tool Kit and
Jack ToolsF. Mounting Bracket
G. Wing Nut Holding
Tire Blocks
H. Wheel Blocks
I. Jack Yukon Denali Rear Access PanelYukon XL Denali
5-76

For Yukon Denali, 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 the rst
step and follow the last three.
For Yukon XL Denali, the equipment you’ll need is
under the storage tray in the left trim panel.
1. Remove the tray to access the tools.
2. Remove the wing nut used to retain the tool kit by
turning it counterclockwise.
3. Release the jack from its holder by turning the knob
on the jack counterclockwise to lower the jack head.
4. Remove the wheel blocks and the wheel block
retainer by turning the wing nut counterclockwise.
You’ll use the jack handle extensions and the wheel
wrench to remove the underbody-mounted spare tire.
A. Spare Tire
(Valve Stem
Pointed Down)
B. Hoist Assembly
C. Hoist Cable
D. Tire Retainer
E. Hoist Shaft
F. Hoist End of
Extension ToolG. Hoist Shaft
Access Hole
H. Wheel Wrench
I. Jack Handle
Extensions
J. Hoist Lock
(If Equipped)
1. Open the spare tire lock cover on the bumper and
use the ignition key to remove the lock if your
vehicle is equipped with a hoist lock (J).
5-77

2. Assemble the wheel wrench (H) and the two jack
handle extensions (I) as shown.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. SeeSecondary Latch System on
page 5-86.
5-78

5. Use the wheel wrench
hook which allows you
to pull the hoist
cable towards you to
assist in reaching
the spare tire.6. Tilt the retainer (D) at
the end of the cable
when the tire has been
lowered, so it can
be pulled up through
the wheel opening.
7. Put the spare tire near the at tire.
5-79

Removing the Flat Tire and
Installing the Spare Tire
Use the following pictures and instructions to remove
the at tire and raise the vehicle.
The tools you’ll be using include the jack (A), the wheel
blocks (B), the jack handle (C), the jack handle
extensions (D), and the wheel wrench (E).1. Remove the center cap by placing the chisel end of
the wheel wrench in the slot on the wheel and
gently pry the cap out.
5-80

3. Position the jack under the vehicle.
{CAUTION:
Getting under a vehicle when it is jacked up is
dangerous. If the vehicle slips off the jack you
could be badly injured or killed. Never get under
a vehicle when it is supported only by a jack.
{CAUTION:
Raising your vehicle with the jack improperly
positioned can damage the vehicle and even
make the vehicle fall. To help avoid personal
injury and vehicle damage, be sure to t the
jack lift head into the proper location before
raising the vehicle.Front Tire Flat:If the at 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
the at 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.Front Position
5-82

Rear Tire Flat:If the at
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.4. Remove all the wheel
nuts and take off the
at tire.
Rear Position
5-83