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{CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to come 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 the
proper torque speci cation. SeeCapacities
and Specifications on page 5-103for wheel nut
torque speci cation.
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 speci cation. SeeCapacities and
Specifications on page 5-103for the wheel nut
torque speci cation.11. Tighten the wheel 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 the center cap. Place the cap on the
wheel and tap it into place until it seats ush with the
wheel. The cap only goes on one way. Be sure to line up
the tab on the center cap with the indentation on the
wheel.
For the Xtreme, tighten each nut cap by hand, then
tighten an additional one quarter of a turn with the
wheel wrench.
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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 5-83.
{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 below.To release the spare tire from the secondary latch,
do the following:
1. Check under the
vehicle to see if the
cable end tting
is visible.
2. If the cable end tting is not visible, proceed to
Step 6.
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 wheel wrench
counterclockwise three or four turns.
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4. Repeat this procedure at least two times. If the
spare tire lowers to the ground, continue with
Step 5 underRemoving the Spare Tire and Tools
on page 5-69.
5. 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.
8. Attach the jack handle, extension, and wheel
wrench to the jack and place it (with the wheel
blocks) under the vehicle towards the front of the
rear bumper. Position the center lift point of the
jack under the wheel.
9. Turn the wrench clockwise to raise the jack until it
lifts the tire.
10. Continue raising the jack until the tire stops moving
upward and is held rmly in place, the secondary
latch has released and the tire is balancing on
the jack.
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11. Remove the jack handle and insert the hoist end of
the extension through the hole in the rear bumper.
Turn the wheel counterclockwise one turn or
until the wheel retainer assembly falls out.
12. Reinsert the jack handle into the jack. 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.
{CAUTION:
Someone standing too close during the
procedure could be injured by the jack. If the
spare tire does not slide off the jack completely,
make sure no one is behind you or on either
side of you as you pull the jack out from the
spare.
13. Disconnect the jack handle from the jack and
carefully remove the jack. Use one hand to
push against the spare while rmly pulling the
jack out from under the spare tire with the
other hand.
If the spare tire is hanging from the cable, insert
the hoist handle, extension and wheel wrench into
the hoist shaft hole in the bumper and turn the
wheel wrench counterclockwise to lower the spare
the rest of the way.
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14. Tilt the tire retainer at the end of the cable and pull
it through the wheel opening. Pull the tire out from
under the vehicle.
15. If the cable is hanging under the vehicle, turn the
wheel wrench clockwise to raise the cable back up.
Have the hoist assembly inspected as soon as you
can. You will not be able to store a spare or at
tire using the hoist assembly until it has been
replaced.
To continue changing the at tire, seeRemoving the
Flat Tire and Installing the Spare Tire on page 5-73.
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.
Notice:Storing an aluminum wheel with a at tire
under your vehicle for an extended period of time
or with the valve stem pointing up may damage the
wheel. Always stow the wheel with the valve stem
pointing down and have the wheel/tire repaired
as soon as possible.
Store the tire under the rear of the vehicle in the spare tire
carrier. Use the following art and text to help you.
1. Put the tire on the ground at the rear of the vehicle
with the valve stem pointed down.
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2. Tilt the retainer downward and through the wheel
opening. Make sure the retainer is fully seated
across the underside of the wheel.3. Attach the wheel wrench and extensions together.
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4. Insert the hoist end through the hole in the rear
bumper and into the funnel-shaped guide.
5. Turn the wheel wrench clockwise to raise the
tire part way up. Make sure the retainer is seated
in the wheel opening and the valve stem is
pointed down.
6. Raise the tire fully against the underside of the
vehicle by turning the wheel wrench clockwise
until you feel it skip twice. You cannot overtighten
the cable.7. Make sure the tire is stored securely. Push, pull (A),
and then try to turn (B) the tire. If the tire moves,
check to make sure the tire valve stem is pointing
down, then use the wheel wrench to loosen
and then tighten the cable.
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To store the tools, do the following:
1. Return the wheel wrench, jack extensions and the
storage bag to the locations described under
Removing the Spare Tire and Tools on page 5-69.
2. Install the wheel blocks rst. Then install the jack.
3. Secure the items in the vehicle as shown next.
A. Jack
B. Wheel Blocks
C. Wing NutA. Jack
B. Wheel Blocks
C. Wing Nut
Spare Tire
Compact Spare Tire
Your vehicle may be equipped with a compact spare
tire. Although the compact spare tire was fully in ated
when your vehicle was new, it can lose air after a time.
Check the in ation pressure regularly. It should be
60 psi (420 kPa).
Crew Cab
Regular/Extended Cab
5-86