2003 CHEVROLET CORVETTE wheel

Service............................................................5-3
Doing Your Own Service Work.........................5-3
Adding Equipment to the Outside of Your
Vehicle......................................................5-4
Fuel................................................................5-4
Gasoline Octane............................................5-4
Gasoline Speci®cations....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-6
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under
the Hood....................................................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-13
Engine Air Cleaner/Filter................................5-18
Automatic Transmission Fluid.........................5-20
Manual Transmission Fluid.............................5-20
Hydraulic Clutch...........................................5-22
Engine Coolant.............................................5-23
Coolant Surge Tank Pressure Cap..................5-26
Engine Overheating.......................................5-26
Cooling System............................................5-29
Power Steering Fluid.....................................5-35Windshield Washer Fluid................................5-36
Brakes........................................................5-37
Battery........................................................5-40
Jump Starting...............................................5-41
Rear Axle.......................................................5-46
Bulb Replacement..........................................5-47
Halogen Bulbs..............................................5-47
Headlamps..................................................5-47
Taillamps and Turn Signal Lamps...................5-49
Back-Up Lamps............................................5-51
Replacement Bulbs.......................................5-51
Windshield Wiper Blade Replacement..............5-51
Tires..............................................................5-54
Extended Mobility Tires (Except Z06)...............5-54
In¯ation -- Tire Pressure................................5-56
Tire Pressure Monitor System (Except Z06)......5-57
Tire Rotation................................................5-58
Buying New Tires.........................................5-59
Uniform Tire Quality Grading..........................5-60
Wheel Alignment and Tire Balance..................5-61
Wheel Replacement......................................5-61
Tire Chains..................................................5-64
Lifting Your Vehicle.......................................5-64
If a Tire Goes Flat........................................5-68
Tire In¯ator Kit (Z06 Only).............................5-70
Section 5 Service and Appearance Care
5-1

Appearance Care............................................5-75
Cleaning the Inside of Your Vehicle.................5-75
Care of Safety Belts......................................5-77
Weatherstrips...............................................5-77
Cleaning the Outside of Your Vehicle..............5-78
Finish Damage.............................................5-81
Magnesium Wheel Finish...............................5-81
Underbody Maintenance................................5-81
Titanium Exhaust System (Z06 Only)...............5-81
Fiberglass Springs........................................5-81
Chemical Paint Spotting.................................5-81
Vehicle Care/Appearance Materials..................5-82
Vehicle Identi®cation......................................5-83
Vehicle Identi®cation Number (VIN).................5-83
Service Parts Identi®cation Label.....................5-83Electrical System............................................5-84
Add-On Electrical Equipment..........................5-84
Accessory Power Plug...................................5-84
Headlamp Wiring..........................................5-85
Windshield Wiper Fuses................................5-85
Power Windows and Other Power Options.......5-85
Fuses and Circuit Breakers............................5-86
Capacities and Speci®cations..........................5-92
Capacities and Speci®cations.........................5-92
Normal Maintenance Replacement Parts..........5-94
Normal Maintenance Replacement Parts..........5-94
Section 5 Service and Appearance Care
5-2

Brake Wear
Your vehicle has four-wheel disc brakes.
Disc brake pads have built-in wear indicators that make
a high-pitched warning sound when the brake pads
are worn and new pads are needed. The sound
may come and go or be heard all the time your vehicle
is moving (except when you are pushing on the
brake pedal ®rmly).
{CAUTION:
The brake wear warning sound means that
soon your brakes won't work well. That could
lead to an accident. When you hear the brake
wear warning sound, have your vehicle
serviced.
Z06 models are equipped with high performance front
brake linings designed for improved brake performance
under severe use. They will normally exhibit some
low speed noise and you may notice an increase in the
amount of brake dust.
Notice:Continuing to drive with worn-out brake
pads could result in costly brake repair.
Some driving conditions or climates may cause a brake
squeal when the brakes are ®rst applied or lightly
applied. This does not mean something is wrong with
your brakes.
Brake linings should always be replaced as complete
axle sets.
See
Brake System Inspection on page 6-13.
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in
pedal travel. This could be a sign of brake trouble.
Brake Adjustment
As you make brake stops, your disc brakes
automatically adjust for wear.
5-39

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
®lled with air, it provides a cushion between the road and
the wheel. Because you won't have this cushion when
driving on a de¯ated 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 de¯ated condition. When a tire has been
damaged, or if you've driven any distance on a
de¯ated 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 GM or Goodyear
EMT servicing facility for inspection and repair or
replacement. To locate the nearest GM or Goodyear
EMT servicing facility, call Roadside Assistance.
For phone numbers and Roadside Assistance details
see
Roadside Assistance Program on page 7-6.
You may also contact Goodyear, for the nearest
authorized EMT servicing facility, by calling
1-800-789-9878.
{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 a extended
mobility tire. Let only an authorized EMT
Service Center repair, replace, dismount and
mount extended mobility tires.
The valve stems on your extended mobility tires have
sensors that are part of the Tire Pressure Monitor
(TPM). See
Tire Pressure Monitor System (Except Z06)
on page 5-57. 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.
5-55

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 vehicle's extended
mobility feature. When using winter tires on your vehicle,
be sure to use them on all four wheels. See
Buying
New Tires on page 5-59.
In¯ation -- Tire Pressure
The Tire±Loading Information label, which is on the rear
edge of the driver's door, shows the correct in¯ation
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 underin¯ation
or overin¯ation is all right. It's not. If your tires
don't have enough air (underin¯ation), you can get
the following:
·Too much ¯exing
·Too much heat
·Tire overloading
·Bad wear
·Bad handling
·Bad fuel economyIf your tires have too much air (overin¯ation), 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
Use a good quality pocket-type gage to check tire
pressure. You can't tell if your tires are properly in¯ated
simply by looking at them. Radial tires may look
properly in¯ated even when they're underin¯ated.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.
If your vehicle is equipped with the Tire Pressure
Monitor, you can check tire in¯ation pressures while
driving. After you've reached a speed of 15 mph
(24 kmh) 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.
5-56

If the display doesn't show tire pressure, or if the
SERVICE TIRE MON SYS message appears see your
dealer for service. For more information, see
Tire
Pressure Monitor System (Except Z06) on page 5-57
andDriver Information Center (DIC) on page 3-44.
Tire Pressure Monitor System
(Except Z06)
The Tire Pressure Monitor (TPM) has a sensor on each
road wheel that transmits to a receiver on the
instrument panel.
The system operates on a radio frequency subject to
Federal Communications Commission (FCC) Rules and
with Industry and Science Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.This device complies with RSS±210 of Industry and
Science Canada. Operation is subject to the following
two conditions: (1) this device may not cause
interference, and (2) this device must accept any
interference received, including interference that may
cause undesired operation of the device.
Changes or modi®cations to this system by other than
an authorized service facility could void authorization to
use this equipment.
If a tire's in¯ation 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 underin¯ated and two chimes will sound. An
example would be LOW TIRE PRESSURE-LR. This
would mean that the in¯ation pressure in your left rear
tire is between 5 psi (35 kPa) and 25 psi (170 kPa).
If the in¯ation pressure in the tire drops below
5 psi (35 kPa), the message would read FLAT TIRE-LR
and four chimes will sound. See
Driver Information
Center (DIC) on page 3-44.
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 overin¯ated and two chimes will sound. An
example would be HIGH PRESSURE-LR. This would
mean that the in¯ation pressure in your left rear tire
is higher than 42 psi (290 kPa). See
Driver Information
Center (DIC) on page 3-44.
5-57

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
In¯ation -- Tire
Pressure on page 5-56.
{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.
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.
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.
5-58

Buying New Tires
To ®nd 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 Speci®cation (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.
{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),
CAUTION: (Continued)
CAUTION: (Continued)
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 your vehicle is equipped with Extended Mobility Tires
and you feel that winter tires are needed, see
Extended Mobility Tires (Except Z06) on page 5-54.
{CAUTION:
If you use bias-ply tires on your vehicle, the
wheel rim ¯anges 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.
5-59