1999 PONTIAC BONNEVILLE wheel alignment

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6-46 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 wheelnuts 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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6-50 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.

9-
First Edition for Pontiac Bonneville Owner's Manual ± 1999
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9-1
Section 9 Index
A
ccessory Inflator 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessory Power Outlet 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustable Support Seat 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag 1-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-24 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-21, 2-65 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-24 . . . . . . . . . . . . . . . . . . . . . . . . . .
What Will You See After it Inflates 1-24 . . . . . . . . . . . . . . .
When Should it Inflate 1-23 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner 6-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-69 . . . . . . . . . . . . . . . . . . . . .
Air Control, Climate Control System 3-2, 3-4 . . . . . . . . . . . . .
Air Inflator System 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alarm, Universal Theft-Deterrent 2-17 . . . . . . . . . . . . . . . . . .
Alignment and Balance, Tire 6-50 . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-57 . . . . . . . . . . . . . . . . . . . . . .
Antenna, Fixed 3-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antenna, Power 3-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antifreeze 6-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock
Brake System Warning Light 2-68, 4-7 . . . . . . . . . . . . . . . .
Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti
-Lockout Feature 2-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care Materials 6-59 . . . . . . . . . . . . . . . . . . . . . . .
Arbitration Program 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Armrest, Storage 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ashtrays 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Controls, Steering Wheel Touch Control 3-27 . . . . . . .
Audio Equipment, Adding 3-28 . . . . . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Door Locks 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Transaxle 2-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check 7-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overdrive 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Park Mechanism Check 7-35 . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-21 . . . . . . . . . . . . . . . . . . . . . . . . . .
Back-Up Lamp 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back-Up Lamp Bulb Replacement 6-39 . . . . . . . . . . . . . . . . .
Battery 6-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Remote Keyless Entry 2-13 . . . . . . . . . . . . . .
Warning Light 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

First Edition for Pontiac Bonneville Owner's Manual ± 1999
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9-11
Tire Chains 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Loading 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire-Loading Information Label 4-30 . . . . . . . . . . . . . . . . . . .
Tires 6-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance 6-50 . . . . . . . . . . . . . . . . . . . . . . . .
Buying New 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat 5-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Spare 5-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation Check 7-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-46 . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treadwear 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-48 . . . . . . . . . . . . . . . . . . . . . . .
Wear Indicators 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Replacement 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When It's Time for New 6-47 . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Lock 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque, Wheel Nut 5-28, 6-69 . . . . . . . . . . . . . . . . . . . . . . . . .
Towing
Recreational Vehicle 4
-29 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Vehicle 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction
Control System Warning Light 2
-68, 4-9 . . . . . . . . . . . . . .
Off Warning Light 2-68, 4-9 . . . . . . . . . . . . . . . . . . . . . . . .
Traction Control System 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . Trailer
Brakes 4
-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving on Grades 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving with 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling When Towing 4-38 . . . . . . . . . . . . . . . . . . .
Hitches 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Towing 4-38 . . . . . . . . . . . . . . . . . . . . .
Parking on Hills 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tongue Weight 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Weight on Tires 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signals 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight 4-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transaxle Fluid, Automatic 6-20 . . . . . . . . . . . . . . . . . . . . . . .
Transmitters, Matching to Your Vehicle 2-12 . . . . . . . . . . . . .
Transmitters, Remote Keyless Entry 2-10 . . . . . . . . . . . . . . . .
Transportation, Courtesy 8-10 . . . . . . . . . . . . . . . . . . . . . . . . .
Trip Odometer 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trunk
Ajar Message 2
-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lock 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Release Lockout, Remote 2-15 . . . . . . . . . . . . . . . . . . . . . .
Release, Remote 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security Override 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTY Users 8-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal
Lane Change Signals 2
-37 . . . . . . . . . . . . . . . . . . . . . . . . . .
On Chime 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Message 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multifunction Lever 2-36 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When Towing a Trailer 4-37 . . . . . . . . . . . . . . . . . . . . . . . .
Twilight Sentinel
2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

First Edition for Pontiac Bonneville Owner's Manual ± 1999
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9-12
Underbody Flushing Service 7-35 . . . . . . . . . . . . . . . . . . . . .
Underbody Maintenance 6-58 . . . . . . . . . . . . . . . . . . . . . . . . .
Universal Theft-Deterrent System 2-17 . . . . . . . . . . . . . . . . . .
Vehicle
Control 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage Warnings iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 6
-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification Number 6-60 . . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation System 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visor Vanity Mirrors 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visors, Sun 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltmeter 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Devices 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Lights, Gages and Indicators 2-64 . . . . . . . . . . . . . . .
Warranty Information 8-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid Message 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid, Windshield 6-28 . . . . . . . . . . . . . . . . . . . . . . . .
Washing Your Vehicle 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrips 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wheel
Alignment 6
-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nut Torque 5-27, 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Express-Down 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Washer 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Level Check 7-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Wipers 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Replacement 6-43 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter Driving 4-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blade Check 7-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blades, Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring, Headlamp 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrecker Towing 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench, Wheel 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .