
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
speci ed 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
in ated and not overloaded. Excessive speed,
underin ation, 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 might need to be checked. If you notice your
vehicle vibrating when driving on a smooth road, the tires
and wheels might need to be rebalanced. See your
dealer/retailer for proper diagnosis.
5-71

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/retailer if any of these conditions exist.
Your dealer/retailer 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 clearance to
the body and chassis.
5-72

{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after a time. The wheel
could come off and cause a crash. When
you change a wheel, remove any rust or
dirt from 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.
{CAUTION:
Never use oil or grease on studs or the
threads of the wheel nuts. If you do, the wheel
nuts might come loose and the wheel could
fall off, causing a crash.
{CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to become
loose and even come off. This could lead to a
crash. Be sure to use the correct wheel nuts.
If you have to replace them, be sure to get new
GM original equipment wheel nuts.
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.
5-73

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.
Tire Chains
{CAUTION:
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. To help avoid damage to your
vehicle, drive slowly, re-adjust 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
rear tires.
5-74

If a Tire Goes Flat
Your vehicle has a tire sealant and compressor kit.
SeeTire Sealant and Compressor Kit on page 5-76.
There is no spare tire, no tire changing equipment,
and no place to store a tire.
It is unusual for a tire to blow out while you are driving,
especially if you maintain your tires properly. SeeTires
on page 5-51. If air goes out of a tire, it is much more
likely to leak out slowly. But, if you should ever have a
blow out, 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 blow out, particularly on a curve, acts much
like a skid and may require the same correction
you would use in a skid. In any rear blow out, 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, 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. SeeHazard
Warning Flashers on page 3-6.
2. Park your vehicle. If your vehicle has an automatic
transmission, set the parking brake rmly and put the
shift lever in PARK (P). SeeShifting Into PARK (P)
(Automatic Transmission) on page 2-26. If your
vehicle has a manual transmission, move the shift
lever to REVERSE (R) and set the parking brake
rmly. SeeParking Your Vehicle (Manual
Transmission) on page 2-28for additional
information.
3. Turn off the engine.
4. Inspect the at tire.
If the tire has been separated from the wheel, has
damaged sidewalls, or has a puncture larger than a
1 4inch (6 mm), the tire is too severely damaged for
the tire sealant and compressor kit to be effective.
SeeRoadside Assistance Program on page 7-7.
If the tire has a puncture less than a
1 4inch (6 mm)
in the tread area of the tire, seeTire Sealant and
Compressor Kit on page 5-76.
5-75

Accessing the Tire Sealant and
Compressor Kit
To access the tire sealant and compressor kit:
1. Make sure the convertible top is in the up position
before accessing the tire sealant and compressor kit.
2. Open the trunk. SeeTrunk on page 2-9for more
information.
3. Locate the tire sealant and compressor kit on the
driver side of the vehicle, near the back corner of
the trunk.4. Remove the tire sealant
and compressor kit
strap by squeezing the
two tabs of the quick
release buckle.
5. Remove the sealant and compressor kit from its
foam container.
Tire Sealant
Read and follow the safe handling instructions on the
sealant canister.
The sealant can temporarily seal a punctures up to
1/4 inch (6 mm) in the tread area of the tire. The sealant
cannot seal sidewall damage, large punctures, or a
tire that has unseated from the wheel. SeeRoadside
Assistance Program on page 7-7if you need assistance.
The sealant can only be used to seal one tire.
After usage, the sealant canister and sealant lling
hose assembly must be replaced at a dealer/retailer.
See Removal and Installation of Sealant Canister later
in this section.
5-77

{CAUTION:
Storing the tire sealant and compressor
kit 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 the tire sealant
and compressor kit in the proper place.
16. Return the equipment to the proper storage location
in the trunk of your vehicle. You may need to
loosen the retention strap to wrap it around the
sealant and compressor kit and foam container.
To do this, pull apart the strap and loosen the strap
at the quick release buckle. Then snap the buckle
together, pull the strap tight, and secure the
loose end of the strap by mating the ends.
17. Immediately drive the vehicle 5 miles (8 km) to
distribute the sealant evenly in the tire.18. Stop at a safe location and check the tire pressure,
refer to Steps 1 through 8 under “Using the Air
Compressor without Sealant” next in this section.
If the tire pressure has not dropped more than
10 psi (68 kPa) from the recommended in ation
pressure, you can in ate the tire back up to
the recommended in ation pressure.
19. If the tire pressure has fallen more then
10 psi (68 kPa), below the recommended in ation
pressure, stop driving the vehicle. The tire is
too damaged for the sealant to work. See
Roadside Assistance Program on page 7-7.
20. Wipe off any sealant from the wheel, tire, and
vehicle with a rag.
21. Dispose of the sealant canister at a local
dealer/retailer or in accordance with local state
codes and practices.
After using the sealant canister, replace it with a
new canister from your dealer/retailer.
22. After temporarily sealing a tire with the tire sealant
and compressor kit, take your vehicle to your
dealer/retailer to have the tire inspected and
repaired.
5-81

Aluminum or Chrome-Plated Wheels
and Trim
Your vehicle may have either aluminum or
chrome-plated wheels.
Keep the wheels clean using a soft clean cloth with mild
soap and water. Rinse with clean water. After rinsing
thoroughly, dry with a soft clean towel. A wax may then
be applied.
Notice:Chrome wheels and other chrome trim may
be damaged if you do not wash your vehicle after
driving on roads that have been sprayed with
magnesium, calcium or sodium chloride. These
chlorides are used on roads for conditions such as
ice and dust. Always wash your vehicle’s chrome
with soap and water after exposure.
Notice:If you use strong soaps, chemicals,
abrasive polishes, cleaners, brushes, or cleaners
that contain acid on aluminum or chrome-plated
wheels, you could damage the surface of the
wheel(s). The repairs would not be covered by your
warranty. Use only approved cleaners on aluminum
or chrome-plated wheels.
The surface of these wheels is similar to the painted
surface of your vehicle. Do not use strong soaps,
chemicals, abrasive polishes, abrasive cleaners,cleaners with acid, or abrasive cleaning brushes
on them because you could damage the surface.
Do not use chrome polish on aluminum wheels.
Notice:Using chrome polish on aluminum wheels
could damage the wheels. The repairs would not
be covered by your warranty. Use chrome polish
on chrome wheels only.
Use chrome polish only on chrome-plated wheels,
but avoid any painted surface of the wheel, and buff
off immediately after application.
Notice:If you drive your vehicle through an
automatic car wash that has silicone carbide tire
cleaning brushes, you could damage the aluminum
or chrome-plated wheels. The repairs would not
be covered by your warranty. Never drive a vehicle
equipped with aluminum or chrome-plated wheels
through an automatic car wash that uses silicone
carbide tire cleaning brushes.
Tires
To clean the tires, use a stiff brush with tire cleaner.
Notice:Using petroleum-based tire dressing
products on your vehicle may damage the paint
nish and/or tires. When applying a tire dressing,
always wipe off any overspray from all painted
surfaces on your vehicle.
5-91