(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 60, as
shown in item C of the illustration, it would mean
that the tire’s sidewall is 60 percent as high as it
is wide.
(D) Construction Code
:A letter code is used to
indicate the type of ply construction in the tire.
The letter R means radial ply construction;
the letter D means diagonal or bias ply
construction; and the letter B means belted-bias
ply construction.
(E) Rim Diameter
:Diameter of the wheel in
inches.
(F) Service Description
:These characters
represent the load index and speed rating of the
tire. The load index represents the load carry
capacity a tire is certified to carry. The speed
rating is the maximum speed a tire is certified to
carry a load.
Tire Terminology and De nitions
Air Pressure:The amount of air inside the
tire pressing outward on each square inch of the
tire. Air pressure is expressed in pounds per
square inch (psi) or kilopascal (kPa).
Accessory Weight
:This means the combined
weight of optional accessories. Some examples of
optional accessories are, automatic transmission,
power steering, power brakes, power windows,
power seats, and air conditioning.
Aspect Ratio
:The relationship of a tire’s height
to its width.
Belt
:A rubber coated layer of cords that is
located between the plies and the tread. Cords
may be made from steel or other reinforcing
materials.
Bead
:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.
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{WARNING:
If you use bias-ply tires on the 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 the vehicle.
If you must replace your vehicle’s tires with those
that do not have a TPC Spec number, make
sure they are the same size, load range, speed
rating, and construction type (radial and
bias-belted tires) as your vehicle’s original tires.
Vehicles that have a tire pressure monitoring
system could give an inaccurate low-pressure
warning if non-TPC Spec rated tires are installed
on your vehicle. Non-TPC Spec rated tires
may give a low-pressure warning that is higher or
lower than the proper warning level you would
get with TPC Spec rated tires. SeeTire Pressure
Monitor System on page 6-53.
Your vehicle’s original equipment tires are listed
on the Tire and Loading Information Label.
SeeLoading the Vehicle on page 5-19, for more
information about the Tire and Loading Information
Label and its location on your vehicle.
Different Size Tires and Wheels
If you add wheels or tires that are a different size than
your original equipment wheels and tires, this may
affect the way your vehicle performs, including its
braking, ride and handling characteristics, stability, and
resistance to rollover. Additionally, if your vehicle
has electronic systems such as, anti-lock brakes,
traction control, and stability control, the performance of
these systems can be affected.
{WARNING:
If you add different sized wheels, your vehicle may
not provide an acceptable level of performance
and safety if tires not recommended for those
wheels are selected. You may increase the
chance that you will crash and suffer serious
injury. Only use Saturn specific wheel and tire
systems developed for your vehicle, and have
them properly installed by a Saturn certified
technician.
SeeBuying New Tires on page 6-60andAccessories
and Modi cations on page 6-3for additional information.
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Used Replacement Wheels
{WARNING:
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 Saturn original
equipment wheel.
Tire Chains
{WARNING:
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 the 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 the
vehicle and tire size combination and road
conditions. Follow that manufacturer’s instructions.
To help avoid damage to the vehicle, drive slowly,
readjust or remove the device if it is contacting the
vehicle, and do not spin the vehicle’s wheels. If
you do find traction devices that will fit, install
them on the front tires.
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Arming the System.........................................3-16
Assistance Program, Roadside........................... 8-6
Audio System.........................................4-50, 4-69
Audio Steering Wheel Controls......................4-82
Radio Reception..........................................4-83
Rear Seat (RSA).........................................4-79
Setting the Clock.........................................4-51
Theft-Deterrent Feature................................4-81
XM™ Satellite Radio Antenna System............4-84
Audio System(s).............................................4-52
Automatic Climate Control System.....................4-19
Automatic Dimming Mirror Operation..................3-32
Automatic Headlamp System............................4-11
Automatic Transmission
Fluid..........................................................6-23
Operation...................................................3-23
Automatic Transmission Shift Lock Control
System Check.............................................. 7-8
B
Backglass Antenna..........................................4-84
Backing Up....................................................5-31
Battery..........................................................6-35
Electric Power Management..........................4-14
Run-Down Protection...................................4-14
Battery Replacement......................................... 3-5Belt Routing, Engine.......................................7-12
Blizzard Conditions..........................................5-16
Bluetooth Controls...........................................4-69
Bluetooth
®.....................................................4-68
Brake
Emergencies................................................ 5-5
Brake Adjustment............................................6-35
Brake Fluid....................................................6-33
Brake Pedal Travel.........................................6-35
Brake Wear...................................................6-34
Brakes..........................................................6-33
Antilock....................................................... 5-4
Parking......................................................3-26
System Warning Light..................................4-30
Braking........................................................... 5-3
Braking in Emergencies..................................... 5-5
Break-In, New Vehicle.....................................3-19
Bulb Replacement...........................................6-43
Fog Lamps .................................................4-12
Halogen Bulbs............................................6-41
Headlamp Aiming........................................6-40
Headlamps.................................................6-41
License Plate Lamps....................................6-43
Taillamps, Turn Signal, Sidemarker, Stoplamps,
and Back-Up Lamps.................................6-41
Buying New Tires...........................................6-60
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Tires.............................................................6-44
Aluminum Wheels, Cleaning..........................6-94
Buying New Tires........................................6-60
Chains.......................................................6-65
Changing a Flat Tire....................................6-74
Cleaning....................................................6-94
Compact Spare...........................................6-88
Different Size..............................................6-61
High-Speed Operation..................................6-52
If a Tire Goes Flat.......................................6-66
Inflation - Tire Pressure................................6-51
Inspection and Rotation................................6-57
Installing the Spare Tire................................6-78
Pressure Light.............................................4-34
Pressure Monitor Operation...........................6-54
Pressure Monitor System..............................6-53
Removing the Flat Tire.................................6-78
Removing the Spare Tire and Tools...............6-76
Sealant and Compressor Kit.................6-67, 6-74
Sidewall Labeling.........................................6-45
Storing a Flat or Spare Tire and Tools............6-84
Terminology and Definitions...........................6-48
Uniform Tire Quality Grading.........................6-62
Wheel Alignment and Tire Balance.................6-63
Wheel Replacement.....................................6-64
When It Is Time for New Tires......................6-59
To Use the Engine Coolant Heater....................3-22Torque Lock...................................................3-28
Total Weight on the Vehicle’s Tires....................5-30
Towing
Recreational Vehicle.....................................5-24
Towing a Trailer..........................................5-27
Your Vehicle...............................................5-24
TPMS Malfunction Light and Message...............6-55
TPMS Sensor Matching Process
.......................6-56
Traction
Control System (TCS).................................... 5-7
Traction Control Operation................................. 5-8
Traction – AA, A, B, C.....................................6-62
Trailer Brakes.................................................5-30
Transferring a Call..........................................4-76
Transmission
Fluid, Automatic...........................................6-23
Transmission Operation, Automatic....................3-23
Transportation Options...................................... 8-9
Transportation Program, Courtesy....................... 8-9
Treadwear.....................................................6-62
Treadwear 200 Traction AA Temperature A.........6-62
Trip Odometer................................................4-26
Trunk............................................................3-11
Turn and Lane-Change Signals.......................... 4-4
Turn Signal/Multifunction Lever........................... 4-4
Turn Signals When Towing a Trailer..................5-32
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