wheel PONTIAC GRAND PRIX 2000 Repair Manual

6-50
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
-- 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 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 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.

6-51 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.
See ªChanging a Flat Tireº in the Index for
more information.

6-52
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can't know how it's been used or
how far 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.
Tire Chains
NOTICE:
If your vehicle is an SE model with P225/60R16
size tires, don't use tire chains. They can
damage your vehicle because there's not
enough clearance.
NOTICE: (Continued)
NOTICE: (Continued)
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.
If your vehicle is a GT model, a GTP model or if
you have an SE model with other tires, use tire
chains only where legal and only when you must.
Use only SAE Class ªSº 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 slowly 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.

6-58
Foreign materials such as calcium chloride and other
salts, ice melting agents, road oil and tar, tree sap, bird
droppings, chemicals from industrial chimneys, etc., can
damage your vehicle's finish if they remain on painted
surfaces. Wash the vehicle as soon as possible. If
necessary, use non
-abrasive cleaners that are marked
safe for painted surfaces to remove foreign matter.
Exterior painted surfaces are subject to aging, weather
and chemical fallout that can take their toll over a period
of years. You can help to keep the paint finish looking
new by keeping your vehicle garaged or covered
whenever possible.
Cleaning Aluminum Wheels
(If Equipped)
Keep your wheels clean using a soft clean cloth with
mild soap and water. Rinse with clean water. After
rinsing thoroughly, dry with a soft clean towel.
A wax may then be applied.The surface of these wheels is similar to the painted
surface of your vehicle. Don't use strong soaps,
chemicals, abrasive polishes, abrasive cleaners, cleaners
with acid or abrasive cleaning brushes on them because
you could damage the surface. Do not use chrome polish
on any wheels other than chrome
-plated wheels.
Don't take your vehicle through an automatic car wash
that has silicon carbide tire cleaning brushes. These
brushes can also damage the surface of these wheels.
Cleaning Tires
To clean your tires, use a stiff brush with a tire cleaner.
NOTICE:
When applying a tire dressing always take care to
wipe off any overspray or splash from all painted
surfaces on the body or wheels of the vehicle.
Petroleum
-based products may damage the paint
finish and tires.

6-60
GM Vehicle Care/Appearance Materials
PART NUMBERSIZEDESCRIPTIONUSAGE
99495423 in. x 25 in.Polishing Cloth ± Wax TreatedExterior polishing cloth
105017216 oz. (0.473 L)Tar and Road Oil RemoverRemoves tar, road oil and asphalt
105017316 oz. (0.473 L)Chrome Cleaner and PolishUse on chrome, stainless steel, nickel, copper and brass
105017416 oz. (0.473 L)White Sidewall Tire CleanerRemoves soil and black marks from whitewalls
105021432 oz. (0.946 L)Vinyl CleanerCleans vinyl tops, upholstery and convertible tops
105042723 oz. (0.680 L)Glass CleanerRemoves dirt, grime, smoke and fingerprints
1052918**8 oz. (0.237 L)Armor All
ProtectantProtects leather, wood, acrylics, Plexiglas
, plastic,
rubber and vinyl
105292516 oz. (0.473 L)Multi-Purpose Interior
CleanerCleans carpets, seats, interior trim, door panels
and floor mats
105292916 oz. (0.473 L)Wheel CleanerSpray on and rinse with water
10529308 oz. (0.237 L)Capture Dry Spot RemoverAttracts, absorbs and removes soils on fabric
123457212.5 sq. ft.Synthetic ChamoisShines vehicle without scratching
1234572512 oz. (0.354 L)Silicone Tire ShineSpray on tire shine
12377964*16 oz. (0.473 L)Finish EnhancerRemoves dust, fingerprints and surface contaminants
12377966*16 oz. (0.473 L)Cleaner WaxRemoves light scratches and oxidation and protects finish
12377984*16 oz. (0.473 L)Surface CleanerRemoves contaminants, blemishes and swirl marks
See your General Motors Parts Department for these products. * For exterior use only.
See ªRecommended Fluids and Lubricantsº in the Index. ** Not recommended for use on instrument panels.

6-64
Fuse Description
BLANK Blank
BLANK Blank
MALL PGM Mall Module
-- Program
MALL Mall Module
WIPER Wipers
STR WHL
ILLUMSteering Wheel Illumination
BLANK Blank
STR WHL
CTRLSteering Wheel Control
SUNROOF Sunroof
RADIO Radio, Antenna
BLANK Blank
RADIO AMP Bose Amplifier
PWR LOCK Mall Module
-- Power Locks
HSEAT/LUM Heated Seats, Power LumbarFuse Description
R DEFOG Rear Defog
PASSKEY III PASS
-Key
III Security System
RAP Retained Accessory Power
HAZARD Hazard Flashers
PWR MIR Power Mirrors
HVAC HI HVAC Blower
-- Hi
CIG LTR Cigarette Lighter, ALDL, Floor
Console Accessory Outlet
INT LAMP Mall Module
-- Interior lamps
STOP LAMP Stoplamp
AUX/CNSL Accessory Power,
Overhead Console
CD CHG CD Changer
ECM Electronic Control Module
CRUISE Cruise Control

6-70
Radiator Cap
3100 V6 (Code J) AC Type RC27. . . . . . . . . . . . . . . .
3800 V6 (Code K) GM Part No. 10409635. . . . . . . . .
3800 V6 Supercharged (Code 1) GM Part . . . . . . . . .
No. 10409635
Spark Plugs
3100 V6 (Code J) AC Type 41
-940 . . . . . . . . . . . . . . .
Gap: 0.060 inches (.15 mm)
3800 V6 (Code K) AC Type 41
-921 . . . . . . . . . . . . . .
Gap: 0.060 inches (.15 mm)
3800 V6 Supercharged (Code 1) AC Type 41
-921 or
NGK Type PTR4B
-15
Gap: 0.060 inches (.15 mm)
Wiper Blades
Type Hook. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Length 22 inches (55.9 cm). . . . . . . . . . . . . . . . . . . . .
Vehicle Dimensions
Wheelbase 110.5 inches (280.7 cm). . . . . . . . . . . . . .
Tread Width
Front 62.0 inches (157.5 cm). . . . . . . . . . . . . . . . . .
Rear 61.5 inches (156.1 cm). . . . . . . . . . . . . . . . . . .
Length 196.5 inches (499.1 cm). . . . . . . . . . . . . . . . .
Width 72.7 inches (184.5 cm). . . . . . . . . . . . . . . . . . .
Height 54.7 inches (139.0 cm). . . . . . . . . . . . . . . . . . .

8-7
GM Mobility Program for Persons
with Disabilities
This program, available to
qualified applicants, can
reimburse you up to $1,000
toward aftermarket driver or
passenger adaptive
equipment you may require
for your vehicle (hand
controls, wheelchair/scooter
lifts, etc.).This program can also provide you with free resource
information, such as area driver assessment centers and
mobility equipment installers. The program is available
for a limited period of time from the date of vehicle
purchase/lease. See your dealer for more details or call
the GM Mobility Assistance Center at 1
-800-323-9935.
Text telephone (TTY) users, call 1
-800-833-9935.
GM of Canada also has a Mobility Program. Call
1
-800-GM-DRIVE (463-7483) for details. When
calling from outside Canada, please dial 1
-905-644-3063.
All TTY users call 1
-800-263-3830.