2007 PONTIAC GRAND PRIX wheel

Warning:The traction grade assigned to this tire
is based on straight-ahead braking traction
tests, and does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.
Temperature – A, B, C
The temperature grades are A (the highest),
B, and C, representing the tire’s resistance to the
generation of heat and its ability to dissipate
heat when tested under controlled conditions on a
specied indoor laboratory test wheel. Sustained
high temperature can cause the material of the tire
to degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure.
The grade C corresponds to a level of performance
which all passenger car tires must meet under
the Federal Motor Vehicle Safety Standard
No. 109. Grades B and A represent higher levels
of performance on the laboratory test wheel
than the minimum required by law.
Warning:The temperature grade for this tire is
established for a tire that is properly inated
and not overloaded. Excessive speed,
underination, or excessive loading, either
separately or in combination, can cause heat
buildup and possible tire failure.
Wheel Alignment and Tire Balance
The tires and wheels on your vehicle were aligned
and balanced carefully at the factory to give you
the longest tire life and best overall performance.
Adjustments to wheel alignment and tire
balancing will not be necessary on a regular basis.
However, if you notice unusual tire wear or your
vehicle pulling to one side or the other, the
alignment may need to be checked. If you notice
your vehicle vibrating when driving on a smooth
road, your tires and wheels may need to be
rebalanced. See your dealer for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly
rusted or corroded. If wheel nuts keep coming
loose, the wheel, wheel bolts, and wheel
nuts should be replaced. If the wheel leaks air,
replace it (except some aluminum wheels,
which can sometimes be repaired). See your
dealer if any of these conditions exist.
419

Your dealer will know the kind of wheel you need.
Each new wheel should have the same
load-carrying capacity, diameter, width, offset and
be mounted the same way as the one it
replaces.
If you need to replace any of your wheels, wheel
bolts, or wheel nuts, replace them only with
new GM original equipment parts. This way, you
will be sure to have the right wheel, wheel
bolts, and wheel nuts for your vehicle.
{CAUTION:
Using the wrong replacement wheels,
wheel bolts, or wheel nuts on your vehicle
can be dangerous. It could affect the
braking and handling of your vehicle,
make your tires lose air and make you
lose control. You could have a collision in
which you or others could be injured.
Always use the correct wheel, wheel bolts,
and wheel nuts for replacement.Notice:The wrong wheel can also cause
problems with bearing life, brake cooling,
speedometer or odometer calibration,
headlamp aim, bumper height, vehicle ground
clearance, and tire or tire chain clearance
to the body and chassis.
SeeChanging a Flat Tire on page 435for more
information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has
been used or how far it has been driven. It
could fail suddenly and cause a crash. If
you have to replace a wheel, use a new
GM original equipment wheel.
420

Tire Chains
{CAUTION:
If your vehicle has P225/55R17, P255/45R18
or P225/50R18 size tires, do not use tire
chains, there is not enough clearance.
Tire chains used on a vehicle without the
proper amount of clearance can cause
damage to the brakes, suspension or other
vehicle parts. The area damaged by the tire
chains could cause you to lose control of
your vehicle and you or others may be
injured in a crash.
Use another type of traction device
only if its manufacturer recommends
it for use on your vehicle and tire size
combination and road conditions. Follow
that manufacturer’s instructions.
CAUTION: (Continued)
CAUTION: (Continued)
To help avoid damage to your vehicle,
drive slowly, readjust or remove the
device if it is contacting your vehicle, and
do not spin your wheels.
If you do nd traction devices that will t,
install them on the front tires.
Notice:If your vehicle does not have
P225/55R17, P255/45R18 or P225/50R18 size
tires, use tire chains only where legal and only
when you must. Use only SAE Class S-type
chains that are the proper size for your
tires. Install them on the front tires and tighten
them as tightly as possible with the ends
securely fastened. Drive slowly and follow the
chain manufacturer’s instructions. If you
can hear the chains contacting your vehicle,
stop and retighten them. If the contact
continues, slow down until it stops. Driving
too fast or spinning the wheels with chains on
will damage your vehicle.
421

If a Tire Goes Flat
It is unusual for a tire to blowout while you are
driving, especially if you maintain your tires
properly. SeeTires on page 400. If air goes out of
a tire, it is much more likely to leak out slowly.
But if you should ever have a blowout, here are a
few tips about what to expect and what to do:
If a front tire fails, the at tire will create a drag that
pulls the vehicle toward that side. Take your
foot off the accelerator pedal and grip the steering
wheel rmly. Steer to maintain lane position,
and then gently brake to a stop well out of the
traffic lane.
A rear blowout, particularly on a curve, acts much
like a skid and may require the same correction
you’d use in a skid. In any rear blowout, remove
your foot from the accelerator pedal. Get the
vehicle under control by steering the way you want
the vehicle to go. It may be very bumpy and
noisy, but you can still steer. Gently brake to a
stop, well off the road if possible.If a tire goes at, and your vehicle has a spare
tire, seeChanging a Flat Tire on page 435.
This information shows you how to use your
vehicle’s tire changing equipment and how
to change a at tire safely.
{CAUTION:
Lifting a vehicle and getting under it to do
maintenance or repairs is dangerous
without the appropriate safety equipment
and training. The jack provided with your
vehicle is designed only for changing a
at tire. If it is used for anything else, you
or others could be badly injured or killed
if the vehicle slips off the jack. Use the
jack provided with your vehicle only for
changing a at tire.
422

If a Tire Goes Flat (GXP)
GXP models have no spare tire, no tire changing
equipment, and no place for storing a spare or
at tire. If a tire goes at, avoid further tire
and wheel damage by driving slowly to a level
place and stopping. Then do this:
1. Turn on the hazard warning ashers. See
Hazard Warning Flashers on page 134.
2. Park your vehicle. Set the parking brake rmly
and put the shift lever in PARK (P). See
Shifting Into Park (P) on page 116for
additional information.
3. Turn off the engine.
4. Inspect the at tire.
If the tire has been separated from the wheel or
has damaged sidewalls or large tears that
allow rapid air loss, call a tire repair facility. See
Roadside Assistance Program on page 498.
If the at tire is due to a slow leak caused by a nail
or other similar road hazard, the tire inator kit may
be used to temporarily repair the damaged tire.The kit uses a liquid tire sealant to seal small
punctures in the tread area of the tire. The at tire is
then inated to at least 30 psi (207 kPa) and driven
to evenly distribute the tire sealant. The tire
pressure is checked after driving for a maximum of
ve miles (8.0 km) to see if the slow leak has been
stopped. If the tire pressure is 19 psi (131 kPa) or
more, inate the tire up to the standard operating
pressure as shown on the tire and loading
information label. This label is attached to the
vehicle’s center-pillar below the driver’s door latch.
SeeInation - Tire Pressure on page 408.
Notice:If the tire pressure has dropped below
19 psi (131 kPa), the vehicle should not be
driven. Damage to the tire may be severe and
the sealant will not be effective. Contact
Roadside Assistance, seeRoadside Assistance
Program on page 498.
You should have the damaged tire repaired as
soon as possible. The tire sealant is a temporary
repair only. If the tire has been lled with tire
sealant, take the tire to a GM dealer for inspection
and repair. SeeTire Inator Kit (GXP) on
page 424for additional information.
423

Changing a Flat Tire
If a tire goes at, avoid further tire and wheel
damage by driving slowly to a level place. Turn on
your vehicle’s hazard warning ashers. See
Hazard Warning Flashers on page 134for more
information.
{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 PARK (P).
CAUTION: (Continued)
CAUTION: (Continued)
3. Turn off the engine and do not restart
while the vehicle is raised.
4. Do not allow passengers to remain in
the vehicle.
To be even more certain the vehicle will
not move, you should 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.
435

When your vehicle has a at tire, use the following
example as a guide to assist you in the placement
of wheel blocks.
The following information will tell you next how to
use the jack and change a tire.Removing the Spare Tire and Tools
The equipment needed to change a tire is
located in the trunk.
1. Open the trunk. SeeTrunk on page 96for
more information.
2. Remove the convenience net, if equipped, by
removing the net hook attachments.
3. Lift up the carpet.
4. Turn the center nut
on the compact
spare tire cover
counterclockwise to
remove it.
5. Remove the cover.
6. Remove the compact spare tire. SeeCompact
Spare Tire on page 447for more information.
436

7. Turn the nut holding the jack counterclockwise
and remove it. Then remove the jack and
wrench.8. The tools you will be using include the
jack (A), extension and protector/guide (B) and
the wheel wrench (C).
437