2008 GMC YUKON XL lock

8. Proceed to the driver side rear tire, and repeat the
procedure in Step 5. The horn sounds two times to
indicate the sensor identication code has been
matched to the driver side rear tire, and the TPMS
sensor matching process is no longer active.
The TIRE LEARNING ACTIVE message on the DIC
display screen goes off.
9. Turn the ignition switch to LOCK/OFF.
10. Set all four tires to the recommended air pressure
level as indicated on the Tire and Loading
Information label.
11. Put the valve caps back on the valve stems.Tire Inspection and Rotation
We recommend that you regularly inspect your
vehicle’s tires, including the spare tire, for signs of
wear or damage. SeeWhen It Is Time for New
Tires on page 5-80for more information.
Tires should be rotated every 5,000 to 8,000 miles
(8 000 to 13 000 km). SeeScheduled Maintenance
on page 6-4.
The purpose of a regular tire rotation is to achieve
a uniform wear for all tires on the vehicle. This
will ensure that your vehicle continues to perform
most like it did when the tires were new.
Any time you notice unusual wear, rotate your
tires as soon as possible and check wheel
alignment. Also check for damaged tires or wheels.
SeeWhen It Is Time for New Tires on page 5-80
andWheel Replacement on page 5-85.
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{CAUTION:
If you use bias-ply tires on your vehicle,
the wheel rim anges could develop
cracks after many miles of driving. A tire
and/or wheel could fail suddenly, causing
a crash. Use only radial-ply tires with the
wheels on your vehicle.
If you must replace your vehicle’s tires with those that
do not have a TPC Spec number, make sure they
are the same size, load range, speed rating, and
construction type (radial and bias-belted tires) as your
vehicle’s original tires.
Vehicles that have a tire pressure monitoring system
may give an inaccurate low-pressure warning if non-TPC
spec rated tires are installed on your vehicle. Non-TPC
Spec rated tires may give a low-pressure warning
that is higher or lower than the proper warning level you
would get with TPC Spec rated tires. SeeTire
Pressure Monitor System on page 5-73.
Your vehicle’s original equipment tires are listed on the
Tire and Loading Information Label. SeeLoading
Your Vehicle on page 4-35, for more information about
the Tire and Loading Information Label and its
location on your vehicle.
Different Size Tires and Wheels
If you add wheels or tires that are a different size than
your original equipment wheels and tires, this could
affect the way your vehicle performs, including its
braking, ride and handling characteristics, stability, and
resistance to rollover. Additionally, if your vehicle
has electronic systems such as anti-lock brakes, rollover
airbags, traction control, and electronic stability control,
the performance of these systems can be affected.
{CAUTION:
If you add different sized wheels, your vehicle
may not provide an acceptable level of
performance and safety if tires not
recommended for those wheels are selected.
You may increase the chance that you will
crash and suffer serious injury. Only use GM
specic wheel and tire systems developed for
your vehicle, and have them properly installed
by a GM certied technician.
SeeBuying New Tires on page 5-80andAccessories
and Modifications on page 5-3for additional information.
5-82

CAUTION: (Continued)
4. Turn off the engine and do not restart
while the vehicle is raised.
5. Do not allow passengers to remain in the
vehicle.
6. Put the wheel blocks at the front and rear
of the tire farthest away from the one
being changed. That would be the tire on
the other side, at the opposite end of the
vehicle.When your vehicle has a at tire, use this as a guide to
assist you in the placement of wheel blocks.
5-89

Removing the Spare Tire and Tools
The equipment you will need to change a at tire is
stored under the storage tray, which is located on the
driver side trim panel (over the rear wheelhouse).
1. Remove the tray to access the tools by pulling up
on the nger depression under the jack symbol.2. Remove the wing nut (B) used to retain the tool bag
by turning it counterclockwise.
3. Turn the knob (A) on the jack counterclockwise to
release the jack and wheel blocks from the bracket.
4. Remove the wheel blocks and the wheel block
retainer by turning the wing nut (C)
counterclockwise. Regular Wheelbase shown, Extended Wheelbase
similar.
5-90

The tools you will be using include the following:
A. Jack
B. Wheel Blocks
C. Jack HandleD. Jack Handle
Extensions
E. Wheel WrenchTo access the spare tire, refer to the following graphics
and instructions:
A. Hoist Assembly
B. Hoist Shaft
C. Hoist Shaft Access
Cover/Hole
D. Jack Handle
Extensions
E. Wheel Wrench
F. Hoist CableG. Tire/Wheel Retainer
H. Spare Tire (Valve
Stem Pointed Down)
I. Hoist Shaft
Access Hole
J. Hoist End of
Extension Tool
K. Spare Tire Lock
1. Open the hoist shaft access door (C) on the
bumper to access the spare tire lock (K).
5-91

2. To remove the spare tire lock, insert the ignition
key, turn it clockwise and then pull it straight out.
3. Assemble the two jack handle extensions (D) and
wheel wrench (E) as shown.4. Insert the open end of
the extension (J)
through the hole in the
rear bumper (I) (hoist
shaft access hole).
Be sure the hoist end (J) of the extension (D)
connects to the hoist shaft (B). The ribbed square
end of the extension is used to lower the spare tire.
5-92

5. Turn the wheel wrench (E) counterclockwise to
lower the spare tire (H) 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 5-100for more information.
6. Use the wheel wrench
hook that allows you to
pull the hoist cable
towards you, to assist
in reaching the
spare tire.
7. Tilt the tire toward the vehicle with some slack in
the cable to access the tire/wheel retainer.
Separate the retainer from the guide pin by sliding
the retainer up the pin while pressing down on
the latch.
5-93

If the wheel has a bolt-on hub cap, loosen the
plastic nut caps by turning the wheel wrench
counterclockwise. The plastic nut caps will be
retained in the hub cap after it is removed from
the wheel.
If your vehicle has only wheel nut caps, loosen the
plastic nut caps with the wheel wrench in a
counterclockwise direction.
3. Use the wheel wrench to loosen all the wheel nuts.
Turn the wheel wrench counterclockwise to loosen
the wheel nuts. Do not remove the wheel nuts yet.A. Front Position
B. Rear Position
{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.
Jacking Locations (Overall View)
5-95