1999 PONTIAC GRAND PRIX inflation pressure

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4-32
Loading Your Vehicle
Two labels on your vehicle show how much weight it
may properly carry. The Tire
-Loading Information label
is on the inside of the trunk lid. The label tells you the
proper size, speed rating and recommended inflation
pressures for the tires on your vehicle. It also gives you
important information about the number of people that
can be in your vehicle and the total weight you can
carry. This weight is called the vehicle capacity weight
and includes the weight of all occupants, cargo and all
nonfactory
-installed options.
The other label is the Certification label, found on the
rear edge of the driver's door. It tells you the gross
weight capacity of your vehicle, called the Gross
Vehicle Weight Rating (GVWR). The GVWR includes
the weight of the vehicle, all occupants, fuel and cargo.
Never exceed the GVWR for your vehicle or the Gross
Axle Weight Rating (GAWR) for either the front or
rear axle.
If you do have a heavy load, spread it out. Don't carry
more than 167 pounds (75 kg) in your trunk.

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5-32
1. Retainer
2. Cover
3. Retainer (Full
Size Spare)
4. Tire
5. Nut
6. Jack
7. Wrench
8. Lock Nut Tool
9. Foam
10. Bolt Screw
11. Nut Extension
and Protector/GuideCompact Spare Tire
Although the compact spare tire was fully inflated when
your vehicle was new, it can lose air after a time.
Check the inflation pressure regularly. It should be
60 psi (420 kPa).
After installing the compact spare on your vehicle, you
should stop as soon as possible and make sure your
spare tire is correctly inflated. The compact spare
is made to perform well at speeds up to 65 mph
(105 km/h) for distances up to 3,000 miles (5 000 km),
so you can finish your trip and have your full
-size tire
repaired or replaced where you want. Of course, it's best
to replace your spare with a full
-size tire as soon as you
can. Your spare will last longer and be in good shape in
case you need it again.

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6-44 Inflation -- Tire Pressure
The Tire-Loading Information label, which is on the
inside of the trunk lid, shows the correct inflation
pressures for your tires when they're cold. ªColdº
means your vehicle has been sitting for at least three
hours or driven no more than 1 mile (1.6 km).
NOTICE:
Don't let anyone tell you that underinflation or
overinflation is all right. It's not. If your tires
don't have enough air (underinflation), you can
get the following:

Too much flexing

Too much heat

Tire overloading

Bad wear

Bad handling

Bad fuel economy.
NOTICE: (Continued)
NOTICE: (Continued)
If your tires have too much air (overinflation),
you can get the following:

Unusual wear

Bad handling

Rough ride

Needless damage from road hazards.
When to Check
Check your tires once a month or more.
Don't forget your compact spare tire. It should be at
60 psi (420 kPa).
How to Check
Use a good quality pocket
-type gage to check tire
pressure. You can't tell if your tires are properly inflated
simply by looking at them. Radial tires may look
properly inflated even when they're underinflated.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt
and moisture.

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6-45 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 ªWhen It's Time for New Tiresº and
ªWheel Replacementº later in this section for
more information.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The first
rotation is the most important. See ªScheduled
Maintenance Servicesº in the Index for scheduled
rotation intervals.
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. Make certain that all wheel nuts are
properly tightened. See ªWheel Nut Torqueº in
the Index.
CAUTION:
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
ªChanging a Flat Tireº in the Index.)

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7-14
Part B: Owner Checks and Services
Listed in this part are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown in
Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. See ªEngine Oilº in the Index for
further details.
Engine Coolant Level Check
Check the engine coolant level and add DEX
-COOL

coolant mixture if necessary. See ªEngine Coolantº in
the Index for further details.Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid if
necessary. See ªWindshield Washer Fluidº in the Index
for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures.
See ªTiresº in the Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See ªAudio Systemsº in the Index
for further details.

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9-11
Tachometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillamp Bulb Replacement 6-40 . . . . . . . . . . . . . . . . . . . . . . .
Tape Player Care 3-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TCS Off Light 2-73, 2-91 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TCS Switch 2-91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft 2-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft-Deterrent Alarm System 2-24 . . . . . . . . . . . . . . . . . . . .
Theft-Deterrent Feature 3-22 . . . . . . . . . . . . . . . . . . . . . . . . . .
THEFTLOCK
3-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 6-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Position, Automatic Transaxle 2-34 . . . . . . . . . . . . . . . .
Tilt Wheel 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time, Setting the 3-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Chains 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Loading 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance 6-48 . . . . . . . . . . . . . . . . . . . . . . . .
Buying New 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Spare 5-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation 6-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation Check 7-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-45 . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Information Label 4-32 . . . . . . . . . . . . . . . . . . . . .
Pressure 6-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treadwear 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-47 . . . . . . . . . . . . . . . . . . . . . . .
Wear Indicators 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Replacement 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . When It's Time for New 6
-46 . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lock 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Nut 5-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 4-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recreational Vehicle 4-31 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Vehicle 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trac Off Light 2-74, 2-87, 2-91 . . . . . . . . . . . . . . . . . . . . . . .
Trac Switch 2-87, 2-91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction
Control System 4
-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control System Warning Light 2-73, 4-9 . . . . . . . . . . . . . .
Enhanced System Warning Light 2-74, 4-10 . . . . . . . . . . . .
Low Light 2-74, 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer
Backing Up 4
-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving on Grades 4-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving with 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling When Towing 4-40 . . . . . . . . . . . . . . . . . . .
Following Distance 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Towing 4-40 . . . . . . . . . . . . . . . . . . . . .
Making Turns 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking on Hills 4-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passing 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tongue Weight 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Weight on Tires 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signals 4-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .