1999 Oldsmobile Silhouette wheel alignment

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6-41 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
Certification/Tire 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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6-45 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-
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9-1
Section 9 Index
A
ccessory Inflator System 2-81 . . . . . . . . . . . . . . . . . . . . . . .
Accessory Power Outlets 2-83 . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment to the Outside of Your Vehicle 6-3 . . . . . .
Adjusting
Bucket Seats 1
-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Split Bench Seats 1-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag 1-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-44 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-41, 1-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-40, 2-89 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System 1-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-43 . . . . . . . . . . . . . . . . . . . . . . . . . .
What Will You See After it Inflates 1-44 . . . . . . . . . . . . . . .
When Should it Inflate 1-43 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner/Filter 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning 3-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-64 . . . . . . . . . . . . . . . . . . . . .
Air Inflator 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance, Tire 6-45 . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-52 . . . . . . . . . . . . . . . . . . . . . .
Antenna, Integrated Windshield 3-27 . . . . . . . . . . . . . . . . . . . .
Antifreeze 6-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock
Brake System Warning Light 2-91, 4-7 . . . . . . . . . . . . . . . .
Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appearance Care 6
-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care Materials 6-54 . . . . . . . . . . . . . . . . . . . . . . .
Ashtray 2-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic
Door Locks 2
-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overdrive 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Transaxle 6-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check 7-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Add Fluid 6-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Check Fluid 6-18 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Park Mechanism Check 7-33 . . . . . . . . . . . . . . . . . . . . . . . .
Shifting 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Check and Change Fluid 6-18 . . . . . . . . . . . . . . . .
Battery 6-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 5-3, 5-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Saver 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBB Auto Line 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Leaving on a Long Trip 4-22 . . . . . . . . . . . . . . . . . . . .
Better Business Bureau (BBB) Mediation 8-4 . . . . . . . . . . . . .
Blizzard 4-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .