GMC YUKON 2008 Owner's Manual

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

Once the retainer is separated from the guide pin,
tilt the retainer and pull it through the center of
the wheel along with the cable and latch.
8. Put the spare tire near the at tire.
Removing the Flat Tire and
Installing the Spare Tire
Use the following pictures and instructions to remove
the at tire and raise the vehicle.
1. Do a safety check before proceeding. SeeChanging
a Flat Tire on page 5-88for more information.
2. Remove the center cap, if your vehicle has one, by
placing the chisel end of the wheel wrench in the
slot on the wheel and gently pry the cap out.
5-94

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

{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.
4. Position the jack under the vehicle as shown.
Front Tire Flat:If the at tire is on a front tire of the
vehicle, you will need to use the jack handle (B) and
only one jack handle extension (C). Attach the wheel
wrench (D) to the jack handle extension (C). Attach
the jack handle (B) to the jack (A). Position the jack
on the frame behind the at tire where the frame
sections overlap (E). Turn the wheel wrench (D)
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
5-96

LXXIRear Tire Flat:If the at tire is on a rear tire of the
vehicle, you will need to use the jack handle (B)
and both jack handle extensions (C). Attach
the wheel wrench (D) to the jack handle
extensions (C). Attach the jack handle (B) to the
jack (A). Use the jacking pad provided on the rear
axle. Turn the wheel wrench (D) 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 Position – 1500 Models
Rear Position – All Other Models
5-97

5. Remove all of the
wheel nuts.
6. Take off the at tire.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after time. The wheel could
come off and cause an accident. When you
change a wheel, remove any rust or dirt from
CAUTION: (Continued)
CAUTION: (Continued)
places where the wheel attaches to the vehicle.
In an emergency, you can use a cloth or a
paper towel to do this; but be sure to use a
scraper or wire brush later, if needed, to get all
the rust or dirt off. SeeChanging a Flat Tire on
page 5-88.
7. Remove any rust or dirt
from the wheel bolts,
mounting surfaces
and spare wheel.
5-98

{CAUTION:
Never use oil or grease on studs or nuts.
Because the nuts might come loose. The
vehicle’s wheel could fall off, causing a crash.
8. Put the wheel nuts back on with the rounded end
of the nuts toward the wheel after mounting the
spare tire.
9. Tighten each wheel nut by hand. Then use the
wheel wrench to tighten the nuts until the wheel
is held against the hub.
10. Turn the wheel wrench counterclockwise to lower
the vehicle. Lower the jack completely.
{CAUTION:
Incorrect or improperly tightened wheel nuts
can cause the wheel to come loose and even
come off. This could lead to a crash. If you
have to replace them, be sure to get new
original equipment wheel nuts. Stop
somewhere as soon as you can and have the
nuts tightened with a torque wrench to the
proper torque specication. SeeCapacities
and Specifications on page 5-124for wheel nut
torque specication.
Notice:Improperly tightened wheel nuts can lead
to brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the wheel
nuts in the proper sequence and to the proper
torque specication. SeeCapacities and
Specifications on page 5-124for the wheel nut
torque specication.
5-99

11. Tighten the nuts rmly in a crisscross sequence as
shown by turning the wheel wrench clockwise.
When you reinstall the regular wheel and tire, you must
also reinstall either the center cap, bolt-on hub cap,
or plastic nut caps, depending on what your vehicle has.
For center caps, line up the tab on the center cap
with the slot on the wheel. The cap only goes on
one way. Place the cap on the wheel and press until
it snaps into place.
For bolt-on hub caps or plastic nut caps, line up the
nut caps with the wheel nuts and tighten them
clockwise by had to get them started. Continue
tightening with the wheel wrench until snug.
Secondary Latch System
Your vehicle has an underbody-mounted tire hoist
assembly equipped with a secondary latch system. It is
designed to stop the spare tire from suddenly falling
off your vehicle. For the secondary latch to work,
the spare must be installed with the valve stem pointing
down. SeeStoring a Flat or Spare Tire and Tools on
page 5-104.
{CAUTION:
Before beginning this procedure read all the
instructions. Failure to read and follow the
instructions could damage the hoist assembly
and you and others could get hurt. Read and
follow the instructions listed next.
5-100

To release the spare tire from the secondary latch:
1. Check under the
vehicle to see if the
cable end is visible.
If the cable is not
visible proceed
to Step 6.
2. If it is visible, rst try to tighten the cable by turning
the wheel wrench clockwise until you hear two
clicks or feel it skip twice. You cannot overtighten
the cable.
3. Loosen the cable by turning the wrench
counterclockwise three or four turns.
4. Repeat this procedure at least two times. If the
spare tire lowers to the ground, continue with
Step 5 ofRemoving the Spare Tire and Tools on
page 5-90.5. If the spare does not lower, turn the wrench
counterclockwise until approximately 6 inches
(15 cm) of cable is exposed.
6. Stand the wheel blocks on their shortest ends, with
the backs facing each other.
7. Place the bottom edge
of the jack (A) on the
wheel blocks (B),
separating them so that
the jack is balanced
securely.
5-101

8. Attach the jack handle, extension, and wheel
wrench to the jack and place it (with the wheel
blocks) under the vehicle toward the front of the rear
bumper.9. Position the center lift point of the jack under the
center of the spare tire.
10. Turn the wrench clockwise to raise the jack until it
lifts the end tting.
11. Continue raising the jack until the spare tire stops
moving upward and is held rmly in place. The
secondary latch has released and the spare tire is
balancing on the jack.
12. Lower the jack by turning the wheel wrench
counterclockwise. Keep lowering the jack until the
spare tire slides off the jack or is hanging by
the cable.
5-102