2009 GMC ENVOY DENALI lock

Changing a Flat Tire
If a tire goes at, avoid further tire and wheel damage
by driving slowly to a level place. Turn on the hazard
warning ashers. SeeHazard Warning Flashers
on page 3-6.
{CAUTION:
Changing a tire can be dangerous. The vehicle
can slip off the jack and roll over or fall on you or
other people. You and they could be badly injured
or even killed. Find a level place to change your
tire. To help prevent the vehicle from moving:
1. Set the parking brake rmly.
2. Put the shift lever in P (Park).
3. If you have a four-wheel-drive vehicle, be
sure the transfer case is in a drive gear — not
in Neutral.
CAUTION: (Continued)
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 the vehicle has a at tire (B), use the following
example as a guide to assist you in the placement
of wheel blocks (A).
5-88

A. Wheel Block
B. Flat Tire
The following information explains how to use the jack
and change a tire.
Removing the Spare Tire and Tools
The jacking equipment needed to remove the spare tire is
stored under the rear seat. To release the jack from its
holder, turn the knob on the jack counterclockwise to
lower the jack head. SeeRear Seat Operation on
page 1-11for more information.
5-89

The tools you will be using include:
A. Wheel Wrench
B. Wheel Blocks
C. Extension(s)
(Socket End)D. Handle (Jack End)
E. JackTo remove the underbody-mounted spare from your
vehicle:
Notice:If you remove or restow a tire from/to
the storage position under the vehicle while it is
supported by a jack, you could damage the tire
and/or your vehicle. Always remove or restow a tire
when the vehicle is on the ground.
A. Wheel Wrench
B. Hoist Shaft
C. Extension
D. Retainer
E. Spare or Flat Tire
(Valve Stem
Pointed Up)
1. Open the liftgate. SeeLiftgate/Liftglass on
page 2-12for more information.
2. Attach the wheel wrench (A) to the extension (C).
5-90

3. Insert the socket end
of the extension (C) on
a 45 degree angle
downward into the hoist
drive shaft hole.
It is exposed when the rear gate is open and is just
above the rear bumper. Be sure the socket end
of the extension (C) connects to the hoist shaft.
4. Turn the wheel wrench counterclockwise to lower the
spare tire. Keep turning 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 5-97for more information.
5-91

3. Using the wheel
wrench, loosen all the
wheel nuts by
turning the nuts one
turn counterclockwise.
Do not remove
them yet.
4. Turn the jack adjusting knob clockwise by hand to
raise the jack lift head.
5. Place the handle, extension, and wheel wrench
onto the jack.A. Front Frame/
Rear Axle
B. Jack
C. HandleD. Extension(s)
E. Wheel Wrench
6. Place the jack in the appropriate position nearest
the at tire.
Front PositionRear Position
5-93

{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 t the jack lift head into
the proper location before raising the vehicle.7. Raise the vehicle by turning the jack handle
clockwise. Raise the vehicle far enough off the
ground so there is enough room for the spare
tire to t.
5-94

13. Lower the vehicle by turning the jack handle
counterclockwise. Lower the jack completely.
{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
CAUTION: (Continued)
CAUTION: (Continued)
replace them, be sure to get new
originalequipment 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 5-120
for 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 5-120for the wheel nut torque specication.
14. Use the wrench to
tighten the wheel nuts
rmly in a crisscross
sequence as shown.
5-96

2. If 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.
4. Repeat this procedure at least two times.
If the spare tire lowers to the ground, continue with
Step 2 ofRemoving the Spare Tire and Tools on
page 5-89.
5. Turn the wrench counterclockwise until
approximately 6 inches (15 cm) of cable is exposed.
6. Attach the jack handle, extension(s) and the wheel
wrench to the jack and place it under the vehicle
towards the front of the rear bumper. Position
the center lift point of the jack under the center of
the spare tire.
7. Turn the wrench clockwise to raise the jack until it
lifts the end tting.
5-98