2005 GMC ENVOY Owner's Manual

5. Position the chisel end of your wheel wrench in the
notch of the center cap and pry off the center cap.
Removing the Flat Tire and
Installing the Spare Tire
1. Using the wheel
wrench, loosen all the
wheel nuts. Don’t
remove them yet.
2. Turn the jack adjusting knob clockwise by hand to
raise the jack lift head.
3. Place the handle, extension and wheel wrench onto
the jack.
5-75

A. Front Frame/
Rear Axle
B. JackC. Handle
D. Extension(s)
E. Wheel Wrench
4. Place the jack in the appropriate position nearest
the at tire.
{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. Front
Rear
5-76

5. 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.
6. Remove all the wheel nuts and take off the at tire.
{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.
7. Remove any rust or dirt
from the wheel bolts,
mounting surfaces
and spare wheel.
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8. Place the spare on the wheel-mounting surface.
{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.
9. Put the nuts on by
hand. Make sure the
rounded end is
toward the wheel.
10. Tighten each nut by hand until the wheel is held
against the hub. If a nut can’t be turned by hand,
use the wheel wrench and see your dealer as soon
as possible.11. Lower the vehicle by turning the jack handle
counterclockwise. Lower the jack completely.
5-78

{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 specication. SeeCapacities
and Specifications on page 5-113for 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 5-113for the wheel nut
torque specication.12. Use the wrench to
tighten the wheel nuts
rmly in a crisscross
sequence as shown.
5-79

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 or at road tire
from suddenly falling off your vehicle if the cable holding
the spare tire is damaged. For the secondary latch to
work, the tire must be stored with the valve stem
pointing up. SeeStoring a Flat or Spare Tire and Tools
on page 5-82for instructions on storing the spare or
at tire correctly.
{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.
{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.
To release the spare tire from the secondary latch,
do the following:
1. Check under the
vehicle to see if the
cable is visible.
If it is not visible,
proceed to Step 6.
5-80

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 5-72.
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.
8. 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.
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9. 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.
10. 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
socket end of the extension connected to the
wheel wrench into the hoist shaft hole in the bumper
on a 45 degree angle downward. Turn the wheel
wrench counterclockwise to lower the spare the rest
of the way.11. Tilt the retainer at the end of the cable and pull it
through the wheel opening. Pull the tire out from
under the vehicle.
Notice:If you drive away before the spare tire or
secondary latch system cable has been reinstalled,
you could damage your vehicle. Always reinstall
this cable before driving your vehicle.
12. Turn the wheel wrench 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 at tire using
the hoist assembly until it has been repaired or replaced.
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.
5-82