2007 CHEVROLET OPTRA 5 height

(B) Tire Ply Material:The type of cord and
number of plies in the sidewall and under the tread.
(C) Tire Identication Number (TIN):The Tire
Identification Number (TIN). The TIN shows
the manufacturer and plant code, tire size, and
date the tire was manufactured. The TIN is molded
onto both sides of the tire, although only one
side may have the date of manufacture.
(D) Maximum Cold Ination Load
Limit:Maximum load that can be carried and
the maximum pressure needed to support
that load. SeeCompact Spare Tire on page 334
andLoading Your Vehicle on page 236.
(E) Tire Ination:The temporary use tire or
compact spare tire should be inflated to 60 psi
(420 kPa). For more information on tire pressure
and inflation seeInflation - Tire Pressure on
page 311.
(F) Tire Size:A combination of letters and
numbers define a tire’s width, height, aspect ratio,
construction type and service description.
The letter T as the first character in the tire size
means the tire is for temporary use only.Tire Size
The following illustration shows an example of a
typical passenger car tire size.
(A) Passenger (P-Metric) Tire:The United States
version of a metric tire sizing system. The letter P
as the first character in the tire size means a
passenger vehicle tire engineered to standards set
by the U. S. Tire and Rim Association.
(B) Tire Width:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.
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(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 70,
as shown in item C of the illustration, it would
mean that the tire’s sidewall is 70% 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 range and the speed rating
of a tire. The load range 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. Speed ratings range from A to Z.Tire Terminology and Denitions
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/transaxle, 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.
307

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 or tire chain clearance
to the body and chassis.
SeeChanging a Flat Tire on page 324for more
information.
322

Rearview Mirrors......................................... 123
Reclining Seatbacks...................................... 12
Recreational Vehicle Towing........................ 242
Remote Keyless Entry (RKE) System............ 91
Remote Keyless Entry (RKE) System,
Operation................................................... 92
Removing the Flat Tire and Installing the
Spare Tire................................................ 329
Removing the Spare Tire and Tools............ 326
Replacement Bulbs..................................... 301
Reporting Safety Defects
Canadian Government............................. 405
General Motors........................................ 406
United States Government....................... 405
Restraint System Check
Checking the Restraint Systems................. 84
Replacing Restraint System Parts
After a Crash......................................... 85
Right Front Passenger Position,
Safety Belts............................................... 32
Roadside
Assistance Program................................. 394
Rocking Your Vehicle to Get it Out.............. 236
Roof Rack Provisions.................................. 128
Routing, Engine Drive Belt.......................... 354
Running the Engine While Parked............... 122S
Safety Belt
Pretensioners............................................. 37
Reminder Light........................................ 164
Reminder Tone........................................ 164
Safety Belts
Care of.................................................... 339
Center Rear Passenger Position................ 36
Driver Position........................................... 23
How to Wear Safety Belts Properly............ 23
Questions and Answers About
Safety Belts............................................ 22
Rear Seat Passengers............................... 33
Right Front Passenger Position.................. 32
Safety Belt Extender.................................. 37
Safety Belt Use During Pregnancy............. 32
Safety Belts Are for Everyone.................... 18
Shoulder Belt Height Adjuster.................... 31
Safety Warnings and Symbols......................... 4
Seats
Driver Seat Tilt Adjuster............................. 11
Head Restraints......................................... 15
Manual................................................. 9, 10
Manual Lumbar.......................................... 12
Rear Seat Operation.................................. 16
Reclining Seatbacks................................... 12
419

Securing a Child Restraint
Rear Seat Position..................................... 59
Right Front Seat Position........................... 62
Selecting the Right Schedule,
Maintenance............................................ 359
Service........................................................ 248
Accessories and Modifications.................. 249
Adding Equipment to the Outside of
Your Vehicle......................................... 251
California Proposition 65 Warning............. 249
Doing Your Own Work............................. 250
Engine Soon Light................................... 172
Publications Ordering Information............. 406
Servicing Your Airbag-Equipped Vehicle......... 82
Sheet Metal Damage................................... 342
Shifting Into Park (P)................................... 117
Shifting Out of Park (P)............................... 118
Short Trip/City Scheduled Maintenance........ 361
Shoulder Belt Height Adjuster........................ 31
Signals, Turn and Lane-Change.................. 142
Spare Tire
Compact.................................................. 334
Installing.................................................. 329
Removing................................................ 326
Storing..................................................... 333Specifications, Capacities............................ 352
Speed Sensitive Power Steering (SSPS)
Warning Light........................................... 170
Speedometer............................................... 163
Starting Your Engine................................... 107
Steering...................................................... 214
Steering, Suspension and Front Drive
Axle Boot and Seal Inspection................. 380
Steering Wheel Controls, Audio................... 202
Steering Wheel, Tilt Wheel.......................... 141
Storage Areas............................................. 126
Convenience Net..................................... 129
Cupholder(s)............................................ 126
Front Armrest Storage Area...................... 128
Front Storage Area.................................. 127
Glove Box................................................ 126
Hideaway Rear Storage Bins................... 130
Rear Seat Armrest................................... 129
Roof Rack Provisions............................... 128
Sunglasses Storage Compartment............ 127
Stuck in Sand, Mud, Ice, or Snow............... 235
Sun Visors.................................................. 102
Sunroof....................................................... 131
420