2004 CHEVROLET OPTRA height

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.
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 that hold the
tire onto the rim.
Bias Ply Tire:A pneumatic tire in which the plies are
laid at alternate angles, less than 90 degrees to the
centerline of the tread.
Cold Ination Pressure:The amount of air pressure in
a tire, measured in pounds per square inch (psi) or
kilopascal (kPa), before a tire has built up heat
from driving. SeeInflation - Tire Pressure on page 5-57.Curb Weight:This means the weight of a motor
vehicle with standard and optional equipment including
the maximum capacity of fuel, oil and coolant, but
without passengers and cargo.
DOT Markings:A code molded into the sidewall of a
tire signifying that the tire is in compliance with the U.S.
Department of Transportation motor vehicle safety
standards. The DOT code includes the Tire Identification
Number (TIN), an alphanumeric designator which can
also identify the tire manufacturer, production plant,
brand and date of production.
GVWR:Gross Vehicle Weight Rating, seeLoading
Your Vehicle on page 4-33.
GAWR FRT:Gross Axle Weight Rating for the front
axle, seeLoading Your Vehicle on page 4-33.
GAWR RR:Gross Axle Weight Rating for the rear axle,
seeLoading Your Vehicle on page 4-33.
Intended Outboard Sidewall:The side of an
asymmetrical tire that must always face outward when
mounted on a vehicle.
Kilopascal (kPa):The metric unit for air pressure.
There are 6.9 kPa’s to one psi.
Light Truck (LT-Metric) Tire:A tire used on light duty
trucks and some multipurpose passenger vehicles.
5-55

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 or tire chain
clearance to the body and chassis.
SeeChanging a Flat Tire on page 5-64for more
information.
5-62

D
Daytime Running Lamps (DRL).........................3-13
Daytime Running Lamps Indicator Light.............3-38
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-21
Dinghy Towing................................................4-32
Disarming the System.....................................2-17
Doing Your Own Service Work........................... 5-4
Dolly Towing..................................................4-32
Dome Lamp...................................................3-15
Door
Ajar Light...................................................3-38
Central Door Unlocking System....................... 2-8
Door Ajar Reminder....................................... 2-9
Locks.......................................................... 2-7
Power Door Locks......................................... 2-9
Rear Door Security Locks............................... 2-9
Driver
Position, Safety Belt.....................................1-15
Seat Height Adjuster...................................... 1-4
Driving
At Night.....................................................4-14
City...........................................................4-19
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-20Driving (cont.)
Hill and Mountain Roads..............................4-23
In Rain and on Wet Roads...........................4-16
Winter........................................................4-25
Driving on Snow or Ice....................................4-26
Driving Through Deep Standing Water...............4-18
Driving Through Flowing Water.........................4-18
E
Electrical System
Add-On Equipment......................................5-82
Fuses and Circuit Breakers...........................5-83
Headlamp Wiring.........................................5-82
Power Windows and Other Power Options......5-82
Windshield Wiper Fuses...............................5-82
Emergency Trunk Release Handle.....................2-12
Emissions Inspection and Maintenance
Programs...................................................3-35
Engine
Air Cleaner/Filter.........................................5-18
Battery.......................................................5-38
Check and Service Engine Soon Light............3-33
Coolant......................................................5-21
Coolant Heater............................................2-21
Coolant Temperature Gage...........................3-32
Cooling System Inspection............................6-23
4

G
Gage
Engine Coolant Temperature.........................3-32
Fuel..........................................................3-39
Speedometer..............................................3-27
Tachometer.................................................3-27
Gasoline
Octane........................................................ 5-5
Specifications............................................... 5-5
Glove Box.....................................................2-37
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-4
Head Restraints............................................... 1-7
Headlamp
Aiming.......................................................5-44
Headlamp High/Low-Beam Changer.................... 3-7
Headlamp Wiring............................................5-82
Headlamps....................................................5-44
Bulb Replacement.......................................5-44
Front Turn Signal and Parking Lamps.............5-45
Halogen Bulbs............................................5-44
Sidemarker Lamps.......................................5-47
Turn Signal Lamps......................................5-46
Height Adjuster, Driver Seat............................... 1-4Highbeam On Light.........................................3-38
Highway Hypnosis...........................................4-22
Hill and Mountain Roads..................................4-23
Hold Mode.....................................................2-26
Hold Mode Functions......................................2-26
Hold Mode Light.............................................3-32
Hood
Checking Things Under................................5-10
Release.....................................................5-10
Horn............................................................... 3-5
How the System Alarm is Activated...................2-17
How to Add Coolant to the Coolant
Surge Tank.................................................5-29
How to Check................................................5-58
How to Check and Add Fluid............................5-21
How to Check Power Steering Fluid..................5-33
How to Detect a Tamper Condition....................2-17
How to Inspect the Engine Air Cleaner/Filter.......5-19
How to Turn Off the System Alarm....................2-17
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-15
Hydraulic Clutch.............................................5-20
Hydroplaning..................................................4-18
I
If No Steam Is Coming From Your Engine..........5-26
If Steam Is Coming From Your Engine...............5-25
If the Light Is Flashing.....................................3-34
6

Restraint System Check...................................6-19
Checking Your Restraint Systems...................1-60
Replacing Restraint System Parts After a
Crash.....................................................1-61
Restraint Systems
Checking....................................................1-60
Replacing Parts...........................................1-61
Right Front Passenger Position, Safety Belts......1-24
Roadside
Assistance Program....................................... 7-6
Rocking Your Vehicle To Get It Out...................4-30
Running Your Engine While You Are Parked.......2-34
S
Safety Belt
Pretensioners..............................................1-28
Reminder Light............................................3-28
Reminder Tone............................................3-28
Safety Belts
Care of......................................................5-76
Center Rear Passenger Position....................1-28
Driver Position............................................1-15
How to Wear Safety Belts Properly................1-15
Questions and Answers About Safety Belts.....1-14
Rear Seat Passengers.................................1-24
Right Front Passenger Position......................1-24
Safety Belt Use During Pregnancy.................1-23
Safety Belts Are for Everyone.......................1-10Safety Warnings and Symbols.............................. iii
Seats
Driver Seat Height Adjuster............................. 1-4
Head Restraints............................................ 1-7
Manual..................................................1-2, 1-3
Manual Lumbar............................................. 1-4
Rear Seat Operation...................................... 1-8
Reclining Seatbacks...................................... 1-5
Securing a Child Restraint
Designed for the LATCH System...................1-45
Rear Seat Position......................................1-45
Right Front Seat Position..............................1-48
Security While You Travel.................................. 7-6
Selecting the Right Schedule, Maintenance.......... 6-5
Service........................................................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-5
Doing Your Own Work................................... 5-4
Engine Soon Light.......................................3-33
Publications Ordering Information...................7-12
Service Bulletins.............................................7-13
Service Manuals.............................................7-12
Setting Preset Stations............................3-41, 3-45
Setting the Tone (Bass/Treble)..................3-41, 3-45
Sheet Metal Damage.......................................5-78
Shift Speeds..................................................2-28
Shifting Into Park (P).......................................2-29
Shifting Out of Park (P)...................................2-31
Short Trip/City Definition.................................... 6-5
11

Short Trip/City Intervals..................................... 6-5
Short Trip/City Scheduled Maintenance................ 6-6
Shoulder Belt Height Adjuster...........................1-18
Skidding........................................................4-13
Some Other Rainy Weather Tips.......................4-19
Special Fabric Cleaning Problems.....................5-74
Specifications, Capacities.................................5-90
Speed Sensitive Power Steering (SSPS)
Warning Light.............................................3-31
Speedometer..................................................3-27
Starter Switch Check.......................................6-20
Starting Your Engine...............................2-19, 2-20
Steering.......................................................... 4-9
Steering in Emergencies..................................4-10
Steering, Suspension and Front Drive Axle Boot
and Seal Inspection.....................................6-23
Steering Tips................................................... 4-9
Steering Wheel, Tilt Wheel................................. 3-5
Storage Areas................................................2-37
Cupholder(s)...............................................2-37
Front Armrest Storage Area...........................2-39
Front Storage Area......................................2-38
Glove Box..................................................2-37
Rear Seat Armrest.......................................2-39
Sunglasses Storage Compartment..................2-38
Storing the Flat Tire and Tools..........................5-71
Storing the Spare Tire and Tools.......................5-72Stuck in Sand, Mud, Ice or Snow......................4-30
Sun Visors.....................................................2-16
Sunglasses Storage Compartment.....................2-38
Sunroof.........................................................2-39
T
Tachometer....................................................3-27
Taillamps
Turn Signal, Stoplamps and Back-up Lamps......5-48
Theft-Deterrent, Radio.....................................3-51
Theft-Deterrent System....................................2-16
Theft-Deterrent Systems...................................2-16
Throttle System Inspection...............................6-24
Tilt Wheel........................................................ 3-5
Time .............................................................3-18
Tire Inflation Check.........................................6-18
Tire Sidewall Labeling......................................5-51
Tire Size.......................................................5-54
Tire Terminology and Definitions........................5-55
Tires.............................................................5-51
Buying New Tires........................................5-60
Chains.......................................................5-63
Changing a Flat Tire....................................5-64
Compact Spare Tire.....................................5-72
If a Tire Goes Flat.......................................5-63
12