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Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled conditions
on a specified government test course. For
example, a tire graded
150 would wear
one and a half
(1 1/2) times as well on the
government course as a tire graded
100.
The relative performance of tires depends
upon the actual conditions of their use,
however, and may depart significantly
from the norm due
to variations in driving
habits, service practices and differences
in
road characteristics and climate.
Traction - A, B, C
The traction grades, from highest to
lowest are:
A, B, and C. They represent
the tire’s ability
to stop on wet pavement
as measured under controlled conditions
on specified government test surfaces of
asphalt and concrete.
A tire marked C
may have poor traction performance.
Warning: The traction grade assigned
to
this tire is based on braking
(straight-ahead) traction tests and does
no1 include cornering (turning) traction.
Temperature - A, B, C
The temperature grades are A (the
highest),
B, and C, representing the tire’s
resistance to the generation of heat and
its
ability to dissipate heat when tested under
controlled conditions on a specified
indoor laboratory test wheel. Sustained
high temperature can cause the material
of the tire to degenerate and reduce tire
life, and excessive temperature can lead to
sudden tire failure. The grade
C
corresponds to a level of performance
which all passenger car tires must meet
under the Federal Motor Vehicle Safety
Standard
No. 109. Grades B and A
261
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Service & Appearance Care
represent higher levels of performance on
the laboratory test wheel than the
minimum required by law.
Warning: The temperature grade for this
tire is established for a tire that is properly
inflated and not overloaded. Excessive
speed, underinflation, or excessive
loading, either separately or
in
combination, can cause heat buildup and
possible tire failure. Those grades
are molded on the sidewalls
of passenger car tires.
While the tires available as standard or
optional equipment on General Motors
vehicles may vary with respect to these
grades, all such tires meet General Motors
performance standards and have been
approved for use
on General Motors
vehicles.
All passenger type (P Metric)
tires must conform
to Federal safety
requirements
in addition to these grades.
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.
In most cases, you will not need to have
your wheels aligned again. 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.
... 262
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Page 267 of 358

Wheel Replacement
Replace any wheel that is bent, cracked or
badly rusted.
If wheel nuts keep coming
loose, the wheel, wheel bolts, and wheel
nuts should be replaced. If the wheel
leaks air out, replace
it (except some
aluminum wheels, which can sometimes
be repaired). See your Chevrolet 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 Chevrolet model.
CAUTION:
Using th-t
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.
263 = 9
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Service & Appearance Care
Tire Chains
IL
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer/odometer
y!g@
calibration, headlight aim, bumper32
‘ i.i _. /8*
. .I )
height, vehicle ground clearance,
and tire or tire chain clearance to the
body and chassis. 1
... 264
Used Replacement Wheels
ruwllg it uscu WIIGGI UII yuul
vehicle is dangerous. You can’t
nnOW how it’s been used or how
many miles it’s been driven. It could
fail suddenly and cause an accident.
If you have to replace a wheel use a
new GM original equipment wheel.
Ib
If your Chevrolet has P235/55R16
or
P245/50ZRlf; cize tire. don’t 11c~ I
tire chains: the --In dm e vow I
I
vehicle.
If
you ,.-ve other tires, “st; LIIC
chains only when you must. Use
only
SAE Class “S” type chains
that are the proper size for
y
tires. Install them on the rear tires
and tighten them as tightly as
possible
with the ends securel)
fastened. Drive slowly and
folio
stop and retighten them. If the I
the chain manufacturer’s
instructions.
If you can hear th
chains contacting your vehicle
contact continues, slow down until
I
it stops. Driving too fast wit
chains on will damage yourg
vchicle.
I
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Page 269 of 358
A r!eaning products can be hazardous. Some are toxic. mers can burst into
- me if you strike a match or get them on a hot part of the vehicle. Some a=
d zerous if you breathe their fumes in a closed space. When you use anything
container to clean your Chevrokt, be sure to follow the instructions. And always
open your doors or windows when you’re cleaning the inside.
Never use these to clean your vehicle:
a Gasoline @ Carbon Tetrachloride Turpentine
Benzene @ Acetone m Lacquer Thinner
* Naphtha @ Paint Thinner Nail Polish Remover
They can all be hazardous - some more than others - and they can all damage
your vehicle, too.
Don’t use any of these unless this
manual says you can. In many
uses: &’---- will damage your vehicle:
’aP
0
0
leach
0 Reducing Agents
265 -
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Service & Appearance Care
m.. 266
Cleaning the Inside of Your
Chevrolet
Use a vacuum cleaner often to get rid of
dust and loose dirt. Wipe
vinyl with a
clean, damp cloth.
Your Chevrolet dealer has two
GM
cleaners - a solvent-type spot lifter and
a foam-type powdered cleaner. They
will
clean normal spots and stains very well. Here are some cleaning tips:
0 Always read the instructions
on the
cleaner label.
Clean up stains
as soon as you can -
before they set.
Use a clean cloth or sponge, and
change to a clean area often.
A soft
brush
may be used if stains are
stubborn.
Use solvent-type cleaners
in a
well-ventilated area only. If you use
them, don’t saturate the stained area.
If
a ring forms after spot cleaning,
clean the entire area immediately or
it
will set.
Using Foam-Type Cleaner on Fabric
0
Vacuum and brush the area to remove
any loose
dirt.
Always clean a whole trim panel or
section. Mask surrounding trim along
stitch or welt lines.
Mix Multi-Purpose Powdered Cleaner
following the directions on the
container label.
Use suds only and apply
with a clean
sponge.
Don’t saturate the material.
Don’t rub
it roughly.
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I1
0 As soon as you’ve cleaned the section,
use a sponge to remove the suds.
0 Rinse the section with a clean, wet
sponge.
0 Wipe off what’s left with a slightly
damp paper towel
or cloth.
Then dry it immediately with an air
hose, a hair dryer
or a heat lamp.
~ NOTICE:
Be careful with a hair dryer or heat
lamp.
You could scorch the fabric.
B Wipe with a clean cloth.
Using Solvent-Type Cleaner on Fabric
First, see if you have to use solvent-type
cleaner at all. Some spots and stains will
clean off better with just water and mild
soap.
If you need to use it,
then:
Gently scrape excess soil from the
trim material with a clean, dull knife
or scraper. Use very little cleaner, light
pressure and clean cloths (preferably
cheesecloth). Cleaning should start at
the outside of the stain, “feathering”
toward the center. Keep changing to a
clean section of
the cloth.
0 When you clean a stain from fabric,
immediately dry the area
with an air
hose, hair dryer,
or heat lamp to help
prevent a cleaning ring. (See the
previous NOTICE.)
Fabric Protection
Your Chevrolet has upholstery and carpet
that has been treated with Scotchgard”
Fabric Protector, a
3M product.
Scotchgard
” protects fabrics by repelling
oil and water, which are the carriers
of
most stains. Even with this protection,
you still need to clean your upholstery
often to keep
it looking new.
Further information on cleaning is
available by calling 1-800-433-3296
(in Minnesota, 1-800-642-6 167).
267 =
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Service & Appearance Care
Special Cleaning Problems
Greasy
or oily stains: Like grease, oil,
butter, margarine, shoe polish, coffee with
cream, chewing gum, cosmetic creams,
vegetable oils, wax crayon,
tar and
asphalt.
0 Carefully scrape off excess stain.
0 Then follow the solvent-type
0 Shoe polish, wax crayon, tar and
instructions above.
asphalt will stain if left on a vehicle seat fabric. They should be removed
as soon as possible. Be careful,
because the cleaner will dissolve them
and may cause them to bleed.
Non-greasy stains: Like catsup, coffee
(black), egg, fruit, fruit juice, milk,
soft
drinks, wine, vomit, urine and blood.
0 Carefully scrape off excess stain, then
sponge the soiled area with cool water.
If a stain remains, follow the
foam-type instructions above.
0 If an odor lingers after cleaning
vomit or urine, treat the area with
a waterbaking soda solution:
1 teaspoon (5 ml) of baking soda to
1 cup (250 ml) of lukewarm water.
0 Finally, if needed, clean lightly with
solvent-type cleaner.
Combination stains: Like candy, ice
cream, mayonnaise, chili sauce and unknown stains.
0
0
Carefilly scrape off excess stain, then
clean with cool water and allow to
dry.
If a stain remains, clean it with
solvent-type cleaner.
... 268
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