2006 CHEVROLET OPTRA 5 height

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.
(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, power steering,
power brakes, power windows, power seats, and air
conditioning.
Aspect Ratio:The relationship of a tire’s height to its
width.
5-53

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 5-64for more
information.
5-62

Reporting Safety Defects
Canadian Government..................................7-14
General Motors...........................................7-15
United States Government............................7-14
Restraint System Check
Checking the Restraint Systems....................1-65
Replacing Restraint System Parts After a
Crash.....................................................1-66
Right Front Passenger Position, Safety Belts......1-24
Roadside
Assistance Program....................................... 7-6
Rocking Your Vehicle to Get it Out....................4-28
Roof Rack Provisions......................................2-36
Running the Engine While Parked.....................2-31
S
Safety Belt
Pretensioners..............................................1-27
Reminder Light............................................3-30
Reminder Tone............................................3-30
Safety Belts
Driver Position............................................1-16
How to Wear Safety Belts Properly................1-16
Questions and Answers About Safety Belts.....1-15Safety Belts (cont.)
Rear Seat Passengers.................................1-24
Right Front Passenger Position......................1-24
Safety Belt Extender....................................1-27
Safety Belt Use During Pregnancy.................1-24
Safety Belts Are for Everyone.......................1-11
Shoulder Belt Height Adjuster........................1-23
Safety Warnings and Symbols.............................. iii
Seats
Driver Seat Tilt Adjuster................................. 1-4
Head Restraints............................................ 1-8
Manual..................................................1-2, 1-3
Manual Lumbar............................................. 1-4
Rear Seat Operation...................................... 1-9
Reclining Seatbacks...................................... 1-5
Securing a Child Restraint
Rear Seat Position......................................1-46
Right Front Seat Position..............................1-48
Selecting the Right Schedule, Maintenance.......... 6-5
Service........................................................... 5-3
Accessories and Modifications......................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-4
California Proposition 65 Warning.................... 5-3
Doing Your Own Work................................... 5-4
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Service (cont.)
Engine Soon Light.......................................3-37
Publications Ordering Information...................7-15
Servicing Your Airbag-Equipped Vehicle..............1-64
Sheet Metal Damage.......................................5-79
Shifting Into Park (P).......................................2-26
Shifting Out of Park (P)...................................2-28
Short Trip/City Scheduled Maintenance................ 6-6
Shoulder Belt Height Adjuster...........................1-23
Signals, Turn and Lane-Change........................3-10
Spare Tire
Compact....................................................5-73
Installing....................................................5-69
Removing...................................................5-66
Storing.......................................................5-73
Specifications, Capacities.................................5-88
Speed Sensitive Power Steering (SSPS)
Warning Light.............................................3-35
Speedometer..................................................3-29
Starting Your Engine.......................................2-17
Steering........................................................4-10
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection..............................6-22
Steering Wheel Controls, Audio.........................3-73
Steering Wheel, Tilt Wheel................................. 3-9Storage Areas................................................2-34
Convenience Net.........................................2-36
Cupholder(s)...............................................2-34
Front Armrest Storage Area...........................2-35
Front Storage Area......................................2-35
Glove Box..................................................2-34
Hideaway Rear Storage Bins.........................2-37
Rear Seat Armrest.......................................2-36
Roof Rack Provisions...................................2-36
Sunglasses Storage Compartment..................2-35
Stuck in Sand, Mud, Ice or Snow......................4-27
Sun Visors.....................................................2-13
Sunroof.........................................................2-38
T
Tachometer....................................................3-29
Taillamps
Stoplamps, and Back-Up Lamps....................5-48
Turn Signal, and Stoplamps..........................5-46
Turn Signal, Stoplamps and Back-up Lamps....5-47
TCS Warning Light..........................................3-36
Theft-Deterrent System....................................2-13
Theft-Deterrent Systems...................................2-13
12