lock GMC SIERRA DENALI 2010 Owners Manual

WARNING: (Continued)
4. Turn off the engine and do not restart whilethe vehicle is raised.
5. Do not allow passengers to remain in the vehicle.
To be even more certain the vehicle will not move,
put 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 the vehicle has a flat tire (B), use the following
example as a guide to assist you in the placement of
wheel blocks (A).
A. Wheel Block
B. Flat Tire
The following information explains how to use the jack
and change a tire.
6-87

Removing the Spare Tire and Tools
A. Wing Nut RetainingWheel Blocks
B. Wheel Blocks
C. Retaining Bolt
D. Jack E. Jack Knob
F. Tool Kit and Jack Tools
G. Retaining Bracket and Wing Nut The equipment you will need is located under the
passenger side second row seat. The spare tire is
located underneath the vehicle.
1. Fold the second row seat cushion up to access the jack and tools.
2. Release the jack (D) from its holder by turning the jack knob (E) on the jack counterclockwise to lower
the jack head slightly.
3. Remove the wheel blocks (B) and the retaining bolt (C) by turning the wing nut (A)
counterclockwise.
4. Remove the wing nut (G) used to retain the storage bag and tools. To remove it, turn it
counterclockwise.
Use the jack handle extensions and the wheel wrench
to remove the underbody-mounted spare tire.
6-88

A. Spare Tire (ValveStem Pointed Down)
B. Hoist Assembly
C. Hoist Cable
D. Tire/Wheel Retainer E. Hoist Shaft F. Hoist End of Extension Tool G. Hoist Shaft Access Hole
H. Wheel Wrench I. Jack Handle Extensions
J. Spare Tire Lock (If Equipped) 1. Open the spare tire hoist access hole cover on the
bumper and use the ignition key to remove the
spare tire lock. To remove the spare tire lock, insert
the ignition key, turn it clockwise and pull the lock
straight out.2. Assemble the wheel wrench (H) and the two jack
handle extensions (I) as shown.
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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, if the vehicle has one, may be
engaged causing the tire not to lower. See
Secondary Latch System on page 6‑97.5. Use the wheel wrenchwhich has a hook that
lets you pull the hoist
cable toward you to
assist in reaching the
spare tire.
6-90

Removing the Flat Tire and Installing
the Spare Tire
Use the following pictures and instructions to remove
the flat tire and raise the vehicle.
The tools you will 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. Do a safety check before proceeding. See Changing a Flat Tire
on page 6‑86for more
information.
2. Remove the center cap by placing the chisel end of the wheel wrench in the slot on the wheel and
gently prying the cap out.
6-92

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.
{WARNING:
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.
{WARNING:
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.
4. 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, position the jack under
the rear axle between the spring anchor and the
shock absorber bracket.
6-93

{WARNING:
Never use oil or grease on bolts or nuts because
the nuts might come loose. The vehicle's wheel
could fall off, causing a crash.
7. Put the wheel nutsback on with the
rounded end of the
nuts toward the wheel
after mounting the
spare. Tighten each
wheel nut by hand.
Then use the wheel
wrench to tighten the
nuts until the wheel is
held against the hub.
8. Turn the wheel wrench counterclockwise to lower the vehicle. Lower the jack completely.
{WARNING:
Wheel nuts that are improperly or incorrectly
tightened can cause the wheels to become loose
or come off. The wheel nuts should be tightened
with a torque wrench to the proper torque
specification after replacing. Follow the torque
specification supplied by the aftermarket
manufacturer when using accessory locking wheel
nuts. See Capacities and Specifications
on
page 6‑122
for original equipment wheel nut
torque specifications.
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. See Capacities and
Specifications
on page 6‑122for the wheel nut torque
specification.
6-96

9. Tighten the nuts firmlyin 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 flush 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.
Secondary Latch System
This vehicle may have 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.
See Storing a Flat or Spare Tire and Tools
on
page 6‑100.
{WARNING:
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.
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, first 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.
6-97

3. Loosen the cable by turning the wrenchcounterclockwise three or four turns.
4. Repeat this procedure at least two times. If the spare tire lowers to the ground, continue with
Step 5 of Removing the Spare Tire and Tools
on
page 6‑88.
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 edgeof the jack (A) on the
wheel blocks (B),
separating them so that
the jack is balanced
securely.
8. Attach the jack handle, extension, and wheelwrench to the jack and place it (with the wheel
blocks) under the vehicle toward the front of the
rear bumper.
6-98

9. Position the center lift point of the jack under thecenter of the spare tire.
10. Turn the wrench clockwise to raise the jack until it lifts the end fitting.
11. Continue raising the jack until the spare tire stops moving upward and is held firmly 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.
{WARNING:
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 under the spare.
13. Disconnect the jack handle from the jack and carefully remove the jack. Use one hand to push
against the spare while firmly 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 end of 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.
14. Turn the wheel wrench in the hoist shaft hole in the bumper clockwise to raise the cable back up if the
cable is hanging under the vehicle.
Have the hoist assembly inspected as soon as you can.
You will not be able to store a spare or flat tire using the
hoist assembly until it has been inspected and/or
replaced.
To continue changing the flat tire, see Removing the
Flat Tire and Installing the Spare Tire on page 6‑92.
6-99