wheel PONTIAC BONNEVILLE 2003 Service Manual

Notice: Continuing to drive with worn-out brake
pads could result in costly brake repair.
Some driving conditions or climates may cause a brake
squeal when the brakes are first applied or lightly
applied. This does not mean something
is wrong with
your 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.
See
Brake System Inspection on page 6-23.
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, your brakes adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is complex. Its many
parts have to be of top quality and work well together
if
the vehicle is to have really good braking. Your
vehicle was designed and tested with top-quality GM
brake parts. When you replace parts of your braking
system
- for example, when your brake linings
wear down and you need new ones put in
- be sure
you get new approved GM replacement parts.
If
you don’t, your brakes may no longer work properly. For
example,
if someone puts in brake linings that are
wrong for your vehicle, the balance between your front
and rear brakes can change
- for the worse. The
braking performance you’ve come to expect can change
in many other ways
if someone puts in the wrong
replacement brake parts.
Battery
Your new vehicle comes with a maintenance free
ACDelco@ battery. When it’s time for a new battery, get
one that has the replacement number shown on the
original battery’s label. We recommend an ACDelco
battery.
Warning: Battery posts, terminals and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.
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To reset (calibrate) the system with a Driver Information
Center (DIC):
1.
2.
3.
4.
5.
Turn the ignition switch to ON.
Using the MODE and SELECT buttons, change the The system Completes
the calibration process during
DIC to display TIRE PRESSURE. driving. Calibration time
can take
45 to 90 minutes, ..,
Press and hold the RESET button for about five
seconds.
The display should change to read TIRE
PRESSURE RESET. If TIRE PRESSURE RESET
does not appear on the display after about five
seconds, see your dealer for service.
When you release the button after seeing the TIRE
PRESSURE RESET message, the display will
change to read TIRE PRESSURE NORMAL.
1.
2.
4. Release the TIRE PRESS RESET button and the
system should reset. The TIRE PRESS light will
go out.
To reset (calibrate) the system with a systems monitor:
n 3.
Turn the ignition switch to ON.
Press and hold the TIRE PRESS RESET button for
about five seconds.
should begin to flash.
If the TIRE PRESS light
does not begin to flash after about five seconds, see
your dealer for service.
TIL- TI~T nnr-nn I:-.LL -- LL- -..-.I.--- I I le I 1nc r ncaa II~I 11 VI I 11 IC ayatcl I 13 I I IUI IILUI
depending on your driving habits. After the system has
been calibrated, the system will alert the driver that
a tire is low, up to a maximum speed of
65 mph
(1 05 km/h).
Tire Inspection and Rotation
Tires should be rotated every 6,000 to 8,000 miles
(10 000 to 13 000 km).
Any time you notice unusual wear rotate your tires as
soon as possible and check wheel alignment. Also
check for damaged tires or wheels. See
When It Is Time
for New Tires on page 5-67 and Wheel Replacement
on page 5-69 for more information.
Tne purpose
oi reguiar rorarion is io acnieve more
uniform wear for all tires on the vehicle. The first rotation
is the most important. See “Part A: Scheduled
Maintenance Services,” in Section
6, for scheduled
rotation intervals.
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When rotating your tires, always use the correct rotation
pattern shown here.
Don’t include the compact spare tire in your tire rotation.
After the tires have been rotated, adjust the front and
rear inflation pressures as shown on the Tire-Loading
Information label.
Reset the check tire pressure system. See
Check Tire
Pressure System on page
5-64.
Make certain that all wheel nuts are properly tightened.
See “Wheel Nut Torque” under
Capacities and
Specifications on page
5- 100.
Rust or dirt on a wheel, or on the parts to
which
it is fastened, can make wheel nuts
become loose after a time. The wheel could
come
off and cause an accident. When you
change a wheel, remove any rust or dirt from
places where the wheel attaches to
the vehicle.
In an emergency, you can use a cloth or a
paper towel to do this; but be sure to use a
scraper or wire brush later, if you need
to, to
get all the rust or dirt
off. See “Changing a Flat
Tire”
in the Index.
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Mixing tires couh :ause you to lose control
while driving. If you mix tires of different sizes
or types (radial and bias-belted tires), the
vehicle may not handle properly, and you
could have a crash. Using tires of different
sizes may also cause damage to your vehicle.
Be sure to use the same size and type tires on
all wheels. It’s all right to drive with your
compact spare, though.
It was developed for
use on your vehicle.
I
If you use bias-ply tires on your vehicle, the
wheel rim flanges could develop cracks after many miles of driving.
A tire and/or wheel
could fail suddenly, causing a crash. Use only
radial-ply tires with the wheels on your vehicle.
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Uniform Tire Quality Grading
Quality grades can be found where applicable on the
tire sidewall between tread shoulder and maximum
section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration, which grades tires by
treadwear, traction and temperature performance.
(This applies only
to vehicles sold in the United States.)
The grades are molded on the sidewalls of most
passenger car tires. The Uniform Tire Quality Grading
system does not apply to deep tread, winter-type
snow tires, space-saver or temporary use spare tires,
tires with nominal rim diameters
of 10 to 12 inches
(25
to 30 cm), or to some limited-production tires.
While the tires available on General Motors passenger
cars and light trucks may vary with respect to these
grades, they must also conform
to federal safety
requirements and additional General Motors Tire
Performance Criteria (TPC) standards.
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 (1.5) 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 - AA, A, B, C
The traction grades, from highest to lowest, are AA, A,
B, and C. Those grades 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 straight-ahead braking
traction tests, and does not include acceleration,
cornering, hydroplaning, or peak traction characteristics.
Temperature - A, B, C
The temperature grades are A (the highest), B, and C,
representing the tire’s resistance to the generation
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
ui ireai ar~d iis aLiiiiy iu dissip& i-ledf vvi-Iei-1 t&&
No. 109. Grades B and A 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.
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.
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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.
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.
See
Changing a Flat Tire on page 5-73 for more
information.
Used Replacement Wheels
Using the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
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.
~ dangerous. It could affect the braking and Putting a us
wheel o ~OL licle is
dangerous. You can’t know how it’s been used
or how far it’s been driven.
It could fail
suddenly and cause a crash. If you have to
replace a wheel, use a new GM original
equipment wheel.
I
5-70

Tire Chains
If your vehicle has P235/55R17 size tires, don’t
use tire chains, there’s not enough clearance.
Tire chains used on a vehicle without the proper amount of clearance can cause damage
to the brakes, suspension or other vehicle
parts. The area damaged by the tire chains
could cause you
to lose control of your vehicle
and you or others may be injured in a crash.
Use another type of traction device only if
its
manufacturer recommends it for use on your
vehicle and tire size combination and road
conditions.
Follow that manufacturer’s
instructions.
To help avoid damage to your
vehicle, drive slowly, readjust or remove the
device if it’s contacting your vehicle, and don’t
spin your wheels.
If you do find traction devices that will
fit,
install them on the front tires.
Notice: If your vehicle has a tire size other than
P235/55R17 size tires, use tire chains only where
legal and only when you must. Use only
SAE Class
”S” type chains that are the proper size for your
tires. Install them on the front tires and tighten them as tightly as possible with the ends securely
fastened. Drive slowiy and follow the chain manufacturer’s instructions. If you can hear the
chains contacting your vehicle, stop and retighten
them. If the contact continues,
slow down until
it stops. Driving too fast or spinning the wheels with
chains on will damage your vehicle.
5-7 1

Accessory Inflator
If your vehicle has an air inflator, it is located in the
trunk. The air inflator will wo only with the ignition on.
Inflating something too much can make it
explode, and you or others could be injured.
Be sure to read the inflator instructions, and
inflate any object only to its recommended
pressure.
I -1
Notice: Don’t run your air inflator for longer than
30 minutes at one time. If you do, you may damage
the system.
The air inflator comes with a kit that includes a 20-foot
(6.1 m) hose and an air pressure gage, as well as
instructions and special adapters for inflating things like
an air mattress or a basketball.
If a Tire Goes Flat
It’s unusual for a tire to “blow out” while you’re driving,
especially
if you maintain your tires properly. If air
goes out of a tire, it’s much more likely to leak out
slowly. But
if you should ever have a “blowout”, here are
a few tips about what to expect and what to do:
If a front tire fails, the flat tire will create a drag that
pulls the vehicle toward that side. Take your foot off the
accelerator pedal and grip the steering wheel firmly.
Steer to maintain lane position, and then gently brake to
a stop well out of the traffic lane.
A rear blowout, particularly on a curve, acts much like a
skid and may require the same correction you’d use
in a skid. In any rear blowout, remove your foot from the
accelerator pedal. Get the vehicle under control by
steering the way you want the vehicle to go.
It may be
very bumpy and noisy, but you can still steer. Gently
brake
to a stop - well off the road if possible.
Pressing the
AIR button will activate the inflator for ten If a tire goes flat, the next part shows how to use your
minutes. jacking equipment to change a flat tire safely.
5-72

Changing a Flat Tire
If a tire goes flat, avoid further tire and wheel damage
by driving slowly to a level place. Turn
on your
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' varning flasl s.
Changing L he can cause an y. ... 2
vehicle can slip off the jack and roll over you
or other people. You and they could be badly
injured. Find a level place to change your tire.
To help prevent the vehicle from moving:
1. Set the parking brake firmly.
2. Put the shift lever in PARK (P).
3. Turn off the engine.
To be even more certain the vehicle won't
move: you can put blocks at the front and
rear
of the tire farthest away from the one
being changed. That would be the tire on
the other
side of the vehicle, at the
opposite end.
-
The following steps will tell you how to use the jack and
change a tire.
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Removing the Spare Tire and Tools 5. Remove the wheel wrench, jack and the spare tire
from the trunk.
The equipment you’ll need is in the trunk.
1. Pull the carpeting from the floor of the trunk.
2. Remove the retainer, then lift and remove the cover.
3. Remove the compact spare tire. See Compact
Spare Tire on page 5-81 for more information
about the compact spare tire.
4. Unscrew the wing nuts to remove the container that
holds the wrench and jack. The
tools you’ll be using include the jack
(A) and wheel
wrench
(B).
Removing the Wheel Covers and
Wheel Nut Caps
If your vehicle has aluminum wheels and a center cover
hides the wheel nuts, remove the center cover by
using the flat end
of the wrench to pry it off. Do not drop
the cover or lay it face down,
as it could become
scratched or damaged.
Do not use a hammer or mallet
on this type of cover.
5-74