Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) on your
vehicle, uses radio and sensor technology to check tire
pressure levels. Sensors, mounted on each tire and
wheel assembly, transmit tire pressure readings to a
receiver located in the vehicle. The TPMS sensors
transmit tire pressure readings once every 60 seconds
while the vehicle is being driven and once every
60 minutes when the vehicle is stationary for more than
15 minutes. Using the Driver Information Center (DIC),
tire pressure levels can be viewed by the driver. The
TPMS also uses the DIC to warn the driver when air
pressure, in one or more of the tires, falls below 24 psi
(164 kPa) or is above 42 psi (290 kPa). For additional
information and details about the DIC operation and
displays seeDIC Controls and Displays on page 3-48
andDIC Warnings and Messages on page 3-53.
A low tire pressure warning light also appears on the
instrument panel cluster when a low tire condition exists.
The low tire pressure warning light will be shown each
time the engine is started and stays on until the low tire
condition is corrected.
Each tire, including the spare (if provided), should be
checked monthly when cold and in ated to the in ation
pressure recommended by the vehicle manufacturer
on the vehicle placard or tire in ation pressure label.(If your vehicle has tires of a different size than the size
indicated on the vehicle placard or tire in ation pressure
label, you should determine the proper in ation pressure
for those tires.)
As an added safety
feature, your vehicle has
been equipped with a
tire pressure monitoring
system (TPMS) that
illuminates a low tire
pressure telltale when one
or more of your tires is
signi cantly under-in ated.
Accordingly, when the low tire pressure telltale
illuminates, you should stop and check your tires as
soon as possible, and in ate them to the proper
pressure. Driving on a signi cantly under-in ated tire
causes the tire to overheat and can lead to tire failure.
Under-in ation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling
and stopping ability.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-in ation
has not reached the level to trigger illumination of
the TPMS low tire pressure telltale.
5-67
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 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.
Your dealer will know the kind of wheel you need.
5-73
Removable Roof Panel
Notice:If you use a glass treatment and/or
conditioner that contains ethyl alcohol or ethyl
sulfate on the roof panel, you could damage
the panel. The repairs would not be covered by your
warranty. Only use a GM-approved glass cleaner
on the roof panel.
Special care is necessary when cleaning, removing,
and/or storing the roof panel.
Flush with water to remove dust and dirt, then dry
the panel.
Clean a transparent roof panel with GM Glass
Cleaner. Leave the cleaner on the panel for
one minute, then wipe the panel with a soft,
lint-free cloth. Do not use glass cleaner on a painted
roof panel.
Do not use abrasive cleaning materials on either
type of panel.
If water drops are frequently allowed to dry on the roof
panel, impurities in the water will adhere to the top.
These impurities may etch or mar the nish. When the
panel gets wet, dry it off.
Convertible Top
The vehicle’s convertible top should be cleaned often.
However, high pressure car washes may cause water to
enter your vehicle.
When you hand wash the top, do it in partial shade.
Use a mild soap, lukewarm water and a soft sponge.
A chamois or cloth may leave lint on the top, and
a brush can chafe the threads in the top fabric. Do not
use detergents, harsh cleaners, solvents or bleaching
agents.
Wet the entire vehicle and wash the top evenly to avoid
spots or rings. Let the soap remain on the fabric for
a few minutes. When the top is really dirty, use a mild
foam-type cleaner. Thoroughly rinse the entire
vehicle, then let the top dry in direct sunlight.
To protect the convertible top:
After you wash the vehicle, make sure the top is
completely dry before you lower it.
Do not get any cleaner on the vehicle’s painted
nish; it could leave streaks.
If you decide to go through an automatic car wash,
ask the manager if the equipment could damage
your top.
5-88