CHEVROLET CORVETTE 2000 5.G Owners Manual

6-42
If a tire's inflation pressure is between 5 psi (35 kPa)
and 25 psi (170 kPa), you will see a message on the
Driver Information Center. This message will show
which tire is underinflated and two chimes will sound.
An example would be LOW TIRE PRESSURE
-LR.
This would mean that the inflation pressure in your left
rear tire is between 5 psi (35 kPa) and 25 psi (170 kPa).
If the inflation pressure in the tire drops below 5 psi
(35 kPa), the message would read FLAT TIRE
-LR and
four chimes will sound. See ªDriver Information
Centerº in the Index.
The TPM will also alert you if a tire's pressure is higher
than 42 psi (290 kPa). The message will show which tire
is overinflated and two chimes will sound. An example
would be HIGH PRESSURE
-LR. This would mean that
the inflation pressure in your left rear tire is higher than
42 psi (290 kPa). See ªDriver Information Centerº
in the Index.
If a tire pressure message appears on the Driver
Information Center, stop as soon as you can. Have the
tire pressures checked and set to those shown on your
Tire Loading Information label. See ªInflation
-- Tire
Pressureº in the Index.
CAUTION:
When the LOW TIRE PRESSURE or FLAT
TIRE message is displayed on the Driver
Information Center, your vehicle's handling
capabilities will be reduced during severe
maneuvers. If you drive too fast, you could lose
control of your vehicle. You or others could be
injured. Don't drive over 55 mph (90 km/h) when
the LOW TIRE PRESSURE or FLAT TIRE
message is displayed. Drive cautiously, and check
your tire pressures as soon as you can.

6-43
If a tire goes flat, you won't need to stop on the side of
the road to change the tire. You can just keep on driving.
The shorter the distance you drive and the slower the
speed, the greater the chance that the tire will not have
to be replaced. If you drive on a deflated EMT for
50 miles (80 km) or less and at speeds of 55 mph
(90 km/h) or less, there is a good chance that the tire can
be repaired. The tire can operate effectively with no air
pressure for up to 200 miles (320 km) at speeds up to
55 mph (90 km/h), but the tire would then have to be
replaced. When a tire is filled with air, it provides a
cushion between the road and the wheel. Because you
won't have this cushion when driving on a deflated tire,
try to avoid potholes that could damage your wheel and
require replacement of it.
Some road hazards can damage a tire beyond repair.
This damage could occur even before you've driven on
the tire in a deflated condition. When a tire has been
damaged, or if you've driven any distance on a deflated
EMT, check with an authorized Goodyear EMT Service
Center to determine whether the tire can be repaired or
should be replaced. To maintain your vehicle's extended
mobility feature, all replacement tires must be Extended
Mobility Tires. As soon as possible, contact the nearest
authorized Chevrolet or Goodyear EMT servicing
facility for inspection and repair or replacement. Call Chevrolet at 1-800-CHEV-USA (1-800-243-8872)
or Goodyear at 1
-800-789-9878 24-hours a day for
information on the location of the nearest EMT
servicing facility. In Canada, contact the Customer
Communication Center at 1
-800-263-3777,
or Canadian Roadside Assistance at 1
-800-268-6800.
You can also use the Goodyear number listed above to
locate an authorized EMT servicing facility.
CAUTION:
Extended mobility tires are constructed
differently than other tires and could explode
during improper service. You or others could be
injured or killed if you attempt to repair, replace,
dismount, or mount an extended mobility tire.
Let only an authorized Goodyear EMT Service
Center repair, replace, dismount and mount
extended mobility tires.

6-44
The valve stems on your extended mobility tires have
sensors that are part of the TPM. These sensors contain
batteries which are designed to last for 10 years under
normal driving conditions. See your dealer if you ever
need to have a wheel replaced, or if the sensors ever
need replacement.
NOTICE:
Using liquid sealants can damage the tire valves
and tire pressure monitor sensors in your
extended mobility tires. This damage would not
be covered by warranty. Don't use liquid sealants
in your extended mobility tires.
If you feel that winter tires are needed for your driving
conditions, Goodyear Eagle M+S EMT tires are
available in your original equipment sizes from an
authorized Goodyear EMT retailer. These tires will
improve snow traction while maintaining your
Corvette's extended mobility feature. When using winter
tires on your vehicle, be sure to use them on all four
wheels. See ªBuying New Tiresº in the Index.
Inflation -- Tire Pressure
The Tire-Loading Information label, which is on the
rear edge of the driver's door, shows the correct
inflation pressures for your tires when they're cold.
ªColdº means your vehicle has been sitting for at least
three hours or driven no more than 1 mile (1.6 km).
NOTICE:
Don't let anyone tell you that underinflation or
overinflation is all right. It's not. If your tires
don't have enough air (underinflation), you can
get the following:

Too much flexing

Too much heat

Tire overloading

Bad wear

Bad handling

Bad fuel economy.
NOTICE: (Continued)

6-45
NOTICE: (Continued)
If your tires have too much air (overinflation),
you can get the following:

Unusual wear

Bad handling

Rough ride

Needless damage from road hazards.
When to Check
Check your tires once a month or more.
How to Check
With the Tire Pressure Monitor, you can check tire
inflation pressures while driving. After you've reached a
speed of 15 mph (24 km/h) or more, press and release
the GAGES button on the Driver Information Center
(DIC) until the front tire pressures are displayed.
Then, press and release the GAGES button for the rear
tire pressures. If the display doesn't show tire pressure,
or if the SERVICE TIRE MON SYS message appears,
see your dealer for service.
Tire Rotation
The tires on your vehicle are different sizes front to rear.
Due to this, your tires should not be rotated. Each tire
and wheel should be used only in the position it is in.
When It's Time for New Tires
One way to tell when
it's time for new tires
is to check the
treadwear indicators,
which will appear
when your tires have
only 1/16 inch
(1.6 mm) or less of
tread remaining.

6-46
You need a new tire if any of the following statements
are true:

You can see the indicators at three or more places
around the tire.

You can see cord or fabric showing through the
tire's rubber.

The tread or sidewall is cracked, cut or snagged deep
enough to show cord or fabric.

The tire has a bump, bulge or split.

The tire has a puncture, cut or other damage that
can't be repaired well because of the size or location
of the damage.Buying New Tires
To find out what kind and size of tires you need, look at
the Tire
-Loading Information label.
The tires installed on your vehicle when it was new had
a Tire Performance Criteria Specification (TPC Spec)
number on each tire's sidewall. When you get new tires,
get ones with that same TPC Spec number. That way
your vehicle will continue to have tires that are designed
to give proper endurance, handling, speed rating,
traction, ride and other things during normal service on
your vehicle. If your tires have an all
-season tread
design, the TPC number will be followed by an ªMSº
(for mud and snow).
If you ever replace your tires with those not having a
TPC Spec number, make sure they are the same size,
load range, speed rating and construction type
(bias, bias
-belted or radial) as your original tires.

6-47
CAUTION:
Mixing tires could cause you to lose control while
driving. If you mix tires of different sizes (other
than those originally installed on your vehicle) or
types (radial and bias
-belted tires), the vehicle
may not handle properly, and you could have a
crash. Using tires of different sizes (other than
those originally installed on your vehicle) may
also cause damage to your vehicle. Be sure to use
the correct size and type tires on all four wheels.
If you feel that winter tires are needed, see ªExtended
Mobility Tiresº in the Index.
CAUTION:
If you use bias-ply tires on your vehicle, the
wheel rim flanges could develop cracks after
many miles of driving. A tire and/or wheel could
fail suddenly, causing a crash. Use only radial
-ply
tires with the wheels on your vehicle.
Uniform Tire Quality Grading
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration, which grades tires by
treadwear, traction and temperature performance.
(This applies only to vehicles sold in the United States.)
The grades are molded on the sidewalls of most
passenger car tires. The Uniform Tire Quality Grading
system does not apply to deep tread, winter
-type snow
tires, space
-saver or temporary use spare tires, tires with
nominal rim diameters of 10 to 12 inches (25 to 30 cm),
or to some limited
-production tires.
While the tires available on General Motors passenger
cars and light trucks may vary with respect to these
grades, they must also conform to Federal safety
requirements and additional General Motors Tire
Performance Criteria (TPC) standards.

6-48
Treadwear
The treadwear grade is a comparative rating based on
the wear rate of the tire when tested under controlled
conditions on a specified government test course. For
example, a tire graded 150 would wear one and a half
(1 1/2) times as well on the government course as a tire
graded 100. The relative performance of tires depends
upon the actual conditions of their use, however, and
may depart significantly from the norm due to variations
in driving habits, service practices and differences in
road characteristics and climate.
Traction
-- AA, A, B, C
The traction grades, from highest to lowest, are AA, A,
B, and C. Those grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test surfaces of
asphalt and concrete. A tire marked C may have poor
traction performance. 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 specified 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 inflated and not
overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.

6-49 Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are not
needed. However, if you notice unusual tire wear or
your vehicle pulling one way or the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels
may need to be rebalanced.
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.
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.

6-50
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 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 nuts. If you
do, the nuts might come loose. Your wheel could
fall off, causing a serious accident.
CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to become 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.
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 specification.

6-51
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can't know how it's been used or
how far it's been driven. It could fail suddenly
and cause an accident. If you have to replace a
wheel, use a new GM original equipment wheel.
Using the Wheel Lock Key
If you have a hard top, the wheel lock key sits in a small
depression in the trunk rail on the left side, underneath
the carpeting.
If you have a coupe or a convertible, the wheel lock key
sits in a small depression in the trunk rail directly under
the left rear compartment cover.
Your vehicle's wheel lock key has a unique registration
number. The registration number is printed on a card
included in your lock nut package. Also on this card is
lost key replacement information. This number is not
recorded by GM or your dealer, so be sure not to lose
this card. You will need the information if you ever lose
your wheel lock key.If you or someone else is going to remove the wheels on
your vehicle, make sure that the special wheel nut socket
and wheel lock key are being used.
NOTICE:
Your wheels could be damaged if the wheel
nut socket is not used to remove your
vehicle's wheels.
The wheel nut socket can be used with an air wrench or
a torque wrench. The wheel lock key can be used with a
torque wrench, but not with an air or impact wrench.
NOTICE:
Your wheel lock key or lock nuts could be
damaged if an air or impact wrench is used
with this key.