1999 GMC YUKON Owner's Manual

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UP Marking DOWN Marking
One side of the ratchet has an UP marking. The other
side has a DOWN marking.
With the UP marking on the ratchet facing you, rotate
the ratchet clockwise. That will lift the jack head a little.

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5-24
To access the lug nuts, place the wheel wrench in the
slot on the wheel and gently pry off the center piece to
remove it.
Removing the Flat Tire and Installing the
Spare Tire
1. Use the ratchet and wheel wrench to loosen
all the wheel nuts. Turn the wheel wrench
counterclockwise, with DOWN facing you, to loosen
the wheel nuts. Don't remove the wheel nuts yet.
2. If the flat tire is on the rear of the vehicle, put the
jack handle extension on the jack handle.

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3. Position the jack under the vehicle. If the flat tire is
on the front of the vehicle, position the jack on the
frame behind the flat tire. If the flat tire is on the rear
of the vehicle, position the jack on the axle near the
flat tire between the spring and the shock absorber.
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 fit the jack lift
head into the proper location before raising
the vehicle.

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Front Position Rear Position
4. With UP on the ratchet facing you, raise the vehicle
by turning the ratchet and wheel wrench clockwise.
Raise the vehicle far enough off the ground so there
is enough room for the spare tire to fit.
5. Remove all the wheel
nuts and take off the
flat tire.
6. Remove any rust or dirt
from the wheel bolts,
mounting surfaces and
spare wheel.

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CAUTION:
Rust or dirt on the wheel, or on the parts to
which it is fastened, can make the wheel nuts
become loose after a time. The wheel could come
off and cause an accident. When you change a
wheel, remove any rust or dirt from the 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 you need to, to get all the rust or
dirt off.
CAUTION:
Never use oil or grease on studs or nuts. If you
do, the nuts might come loose. Your wheel could
fall off, causing a serious accident.
7. Replace the wheel nuts
with the rounded end of
the nuts toward the
wheel. Tighten each
wheel nut by hand with
the wheel wrench until
the wheel is held against
the hub.

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Front Position Rear Position
8. Lower the vehicle by turning the ratchet and wheel
wrench counterclockwise. Lower the jack completely.
9. Tighten each wheel nut by turning the wheel
wrench clockwise.

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10. Tighten the nuts firmly
in a crisscross
sequence as shown.
Turn the wheel
wrench clockwise.
CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to become loose
and even come off. This could lead to an accident.
Be sure to use the correct wheel nuts. If you have
to replace them, be sure to get new GM original
equipment wheel nuts.
Stop somewhere as soon as you can and have the
nuts tightened with a torque wrench to
140 lb
-ft (190 N´m)
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 specification.

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5-30 Storing a Flat or Spare Tire and Tools
CAUTION:
Storing a jack, a tire or other equipment in the
passenger compartment of the vehicle could
cause injury. In a sudden stop or collision, loose
equipment could strike someone. Store all these
in the proper place.
Store the flat tire where the spare tire is stored.
Put the tools into the storage box and close it tightly. Fit
the storage box on the bracket with the bolt through the
box. Put the jack onto the box. Be sure the jack is stored
as shown in the following illustrations. The jack handle
attachment point is circled in the following illustrations
to show the direction the jack should face when it is
stored properly. Secure the emergency gloves, if your
vehicle has them, to the jack using the provided strap.
Slide the retainer over the bolt onto the jack and put the
wing nut on it. Turn the nut clockwise until it is tight
against the retainer.Replace the jack storage cover by simply reversing the
removal procedure described earlier.
Jacking Tool Storage
A. Wheel Wrench
B. Jack Handle
C. RatchetD. Jack Storage Box
E. Jacking Tool
Storage Box