2007 CHEVROLET OPTRA 5 tires

Tire and Loading Information LabelA vehicle specific tire and loading information label
shows the seating capacity and the maximum
load your vehicle can properly carry. This label
also contains your vehicle’s original equipment tire
size and the recommended tire inflation pressure.
For more information on tires and inflation see
Tires on page 303andInflation - Tire Pressure on
page 311. The tire and loading information label
is attached inside the glove box of the five door
hatchback model. The tire and loading information
label for the wagon is attached to the vehicle’s
center pillar, below the driver’s door latch.
There is also important loading information on the
Certification label. It tells you the Gross Vehicle
Weight Rating (GVWR) and the Gross Axle Weight
Rating (GAWR) for the front and rear axle; see
“Certification Label” later in this section.
Label Example–5DoorHatchback
Label Example – Wagon
237

Center High-Mounted Stoplamp (CHMSL)
(Hatchback)............................................ 296
Center High-Mounted Stoplamp (CHMSL)
(Wagon)................................................. 297
Taillamps, Turn Signal, and Stoplamps
(Hatchback)............................................ 298
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps (Wagon)........................ 299
Taillamps, Stoplamps and Back-up Lamps
(Hatchback)............................................ 300
License Plate Lamp................................... 301
Replacement Bulbs................................... 301
Windshield Wiper Blade Replacement....... 302
Tires............................................................ 303
Tire Sidewall Labeling............................... 304
Tire Terminology and Definitions............... 307
Inflation - Tire Pressure............................. 311
Tire Pressure Monitor System................... 312
Tire Inspection and Rotation...................... 316
When It Is Time for New Tires.................. 317Buying New Tires...................................... 318
Different Size Tires and Wheels................ 319
Uniform Tire Quality Grading..................... 320
Wheel Alignment and Tire Balance............ 321
Wheel Replacement.................................. 322
Tire Chains............................................... 323
If a Tire Goes Flat.................................... 324
Changing a Flat Tire................................. 324
Removing the Spare Tire and Tools.......... 326
Removing the Flat Tire and Installing the
Spare Tire............................................. 329
Storing a Flat or Spare Tire and Tools...... 333
Compact Spare Tire.................................. 334
Appearance Care........................................ 335
Cleaning the Inside of Your Vehicle.......... 335
Fabric/Carpet............................................. 337
Leather...................................................... 338
Instrument Panel, Vinyl, and Other
Plastic Surfaces..................................... 338
Care of Safety Belts.................................. 339
Section 5 Service and Appearance Care
246

Weatherstrips............................................ 339
Washing Your Vehicle............................... 339
Cleaning Exterior Lamps/Lenses................ 340
Finish Care............................................... 340
Windshield and Wiper Blades.................... 340
Aluminum Wheels...................................... 341
Tires......................................................... 342
Sheet Metal Damage................................. 342
Finish Damage.......................................... 342
Underbody Maintenance............................ 342
Chemical Paint Spotting............................ 343
Vehicle Care/Appearance Materials............ 343
Vehicle Identication.................................. 344
Vehicle Identification Number (VIN)........... 344
Service Parts Identification Label............... 345Electrical System........................................ 345
Add-On Electrical Equipment..................... 345
Headlamp Wiring....................................... 346
Windshield Wiper Fuses............................ 346
Power Windows and Other Power
Options.................................................. 346
Fuses and Circuit Breakers....................... 346
Instrument Panel Fuse Block..................... 347
Engine Compartment Fuse Block............... 349
Capacities and Specications.................... 352
Normal Maintenance Replacement Parts..... 353
Engine Drive Belt Routing......................... 354
Section 5 Service and Appearance Care
247

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 can come and go or be heard all
the time your vehicle is moving, except when you
are pushing on the brake pedal firmly.
{CAUTION:
The brake wear warning sound means that
soon the brakes will not work well. That
could lead to an accident. When you hear
the brake wear warning sound, have your
vehicle serviced.
Notice:Continuing to drive with worn-out
brake pads could result in costly brake repair.Some driving conditions or climates can cause a
brake squeal when the brakes are first applied
or lightly applied. This does not mean something
is wrong with the brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated,
inspect brake pads for wear and evenly tighten
wheel nuts in the proper sequence to GM torque
specifications.
Brake linings should always be replaced as
complete axle sets.
SeeBrake System Inspection on page 381.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
Every time you apply the brakes, with or without
the vehicle moving, the brakes adjust for wear.
283

Tires
Your new vehicle comes with high-quality tires
made by a leading tire manufacturer. If you ever
have questions about your tire warranty and where
to obtain service, see your GM Warranty booklet
for details. For additional information refer to
the tire manufacturer’s booklet included with your
vehicle.
{CAUTION:
Poorly maintained and improperly used
tires are dangerous.
Overloading your vehicle’s tires can
cause overheating as a result of too
much friction. You could have an
air-out and a serious accident. See
Loading Your Vehicle on page 236.
CAUTION: (Continued)
CAUTION: (Continued)

Underinated tires pose the same
danger as overloaded tires. The
resulting accident could cause serious
injury. Check all tires frequently to
maintain the recommended pressure.
Tire pressure should be checked when
your vehicle’s tires are cold. See
Inflation - Tire Pressure on page 311.
Overinated tires are more likely to be
cut, punctured, or broken by a sudden
impact — such as when you hit a
pothole. Keep tires at the
recommended pressure.
Worn, old tires can cause accidents.
If the tire’s tread is badly worn, or if
your vehicle’s tires have been
damaged, replace them.
303

(D) Tire Ply Material:The type of cord and
number of plies in the sidewall and under the tread.
(E) Uniform Tire Quality Grading (UTQG):
Tire manufacturers are required to grade
tires based on three performance factors:
treadwear, traction and temperature resistance.
For more information seeUniform Tire Quality
Grading on page 320.
(F) Maximum Cold Ination Load Limit:
Maximum load that can be carried and the
maximum pressure needed to support that load.
For information on recommended tire pressure
seeInflation - Tire Pressure on page 311
andLoading Your Vehicle on page 236.
(A) Temporary Use Only:The compact spare
tire or temporary use tire has a tread life of
approximately 3,000 miles (5 000 km) and should
not be driven at speeds over 65 mph (105 km/h).
The compact spare tire is for emergency use when
a regular road tire has lost air and gone flat.
SeeCompact Spare Tire on page 334andIf a
Tire Goes Flat on page 324.
Compact Spare Tire Example
305

Traction:The friction between the tire and the
road surface. The amount of grip provided.
Tread:The portion of a tire that comes into
contact with the road.
Treadwear Indicators:Narrow bands, sometimes
called wear bars, that show across the tread of
a tire when only 1/16 inch (1.6 mm) of tread
remains. SeeWhen It Is Time for New Tires on
page 317.
UTQGS (Uniform Tire Quality Grading
Standards):A tire information system that
provides consumers with ratings for a tire’s
traction, temperature, and treadwear. Ratings are
determined by tire manufacturers using
government testing procedures. The ratings are
molded into the sidewall of the tire. SeeUniform
Tire Quality Grading on page 320.Vehicle Capacity Weight:The number of
designated seating positions multiplied by
150 lbs (68 kg) plus the rated cargo load.
SeeLoading Your Vehicle on page 236.
Vehicle Maximum Load on the Tire:Load on an
individual tire due to curb weight, accessory
weight, occupant weight, and cargo weight.
Vehicle Placard:A label permanently attached to
a vehicle showing the vehicle’s capacity weight
and the original equipment tire size and
recommended inflation pressure. See “Tire and
Loading Information Label” underLoading
Your Vehicle on page 236.
310

Ination - Tire Pressure
Tires need the correct amount of air pressure to
operate effectively.
Notice:Do not let anyone tell you that
under-ination or over-ination is all right.
It is not. If your tires do not have enough air
(under-ination), you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air (over-ination),
you can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazardsA vehicle specific tire and loading information
label is attached to your vehicle. This label shows
your vehicle’s original equipment tires and the
correct inflation pressures for your tires when they
are cold. The recommended cold tire inflation
pressure, shown on the label, is the minimum
amount of air pressure needed to support
your vehicle’s maximum load carrying capacity.
For additional information regarding how much
weight your vehicle can carry, and an example
of the tire and loading information label, see
Loading Your Vehicle on page 236. How you load
your vehicle affects vehicle handling and ride
comfort, never load your vehicle with more weight
than it was designed to carry.
When to Check
Check your tires once a month or more. Do not
forget to check the compact spare tire. For
additional information regarding the compact spare
tire, seeCompact Spare Tire on page 334.
311