1999 Oldsmobile Silhouette flat tire

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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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6-44
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.

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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.

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7-2
Have you purchased the GM Protection Plan? The Plan
supplements your new vehicle warranties. See your
Warranty and Owner Assistance booklet, or your dealer
for details.
Introduction
Your Vehicle and the Environment
Proper vehicle maintenance not only helps to keep your
vehicle in good working condition, but also helps the
environment. All recommended maintenance procedures
are important. Improper vehicle maintenance can even
affect the quality of the air we breathe. Improper fluid
levels or the wrong tire inflation can increase the level
of emissions from your vehicle. To help protect our
environment, and to keep your vehicle in good
condition, please maintain your vehicle properly.
How This Section is Organized
This maintenance schedule is divided into five parts:
ªPart A: Scheduled Maintenance Servicesº shows
what to have done and how often. Some of these
services can be complex, so unless you are technically
qualified and have the necessary equipment, you should
let your dealer's service department or another qualified
service center do these jobs.

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7-30
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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8-6
Oldsmobile Roadside Assistance
Program Features and Benefits
Security While You Travel
1-800-442-OLDS (6537)
As the proud owner of a new Oldsmobile vehicle, you
are automatically enrolled in the Oldsmobile Roadside
Assistance program. This value
-added service is
intended to provide you with peace of mind as you drive
in the city or travel the open road.Oldsmobile's Roadside Assistance toll
-free number is
staffed by courteous and capable Roadside Assistance
Representatives who are available 24 hours a day,
365 days a year.
We will provide the following services during the Bumper
to Bumper warranty period, at no expense to you:

Fuel delivery

Lock
-out service (identification required)

Tow to the nearest dealership for warranty service or
in the event of a vehicle
-disabling accident

Flat tire change

Jump starts

Minor repairs to disabled vehicles

Assistance when vehicle is mired in sand, mud
or snow

Trip routing

Trip interruption expense benefits

Dealership locator service

Courtesy Transportation
- See Courtesy
Transportation section for details
Oldsmobile Roadside Assistance specifically excludes
coverage for mounting, dismounting or changing of
snow tires, chains or other traction devices.

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-2
Brake
Adjustment 6-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master Cylinder 6-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pedal Travel 6-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing System Parts 6-30 . . . . . . . . . . . . . . . . . . . . . . . .
System Warning Light 2-90, 6-28 . . . . . . . . . . . . . . . . . . . .
Trailer 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transaxle Shift Interlock (BTSI) 2-50 . . . . . . . . . . . . . . . . .
Transaxle Shift Interlock Check 7-32 . . . . . . . . . . . . . . . . . .
Wear 6-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes, Anti-Lock 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking in Emergencies 4-11 . . . . . . . . . . . . . . . . . . . . . . . . . .
Break-In, New Vehicle 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . .
BTSI 2-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BTSI Check 7-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bucket Seats 1-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjusting 1-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Folding or Reclining the Seatback 1-15 . . . . . . . . . . . . . . . .
Removing 1-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing 1-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canada, Ordering Service and Owner Publications 8-11 . . .
Canadian Roadside Assistance 8-7 . . . . . . . . . . . . . . . . . . . . . .
Capacities and Specifications 6-63 . . . . . . . . . . . . . . . . . . . . . .
Captain's Chairs 1-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing 1-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing 1-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carbon Monoxide 2-52, 4-28, 4-36 . . . . . . . . . . . . . . . . . . . . Cassette
Deck Service 7
-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape Player 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape Player Care 3-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CD Adapter Kits 3-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Center Rear Passenger Position
Bench Seat 1
-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bucket Seat 1-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification/Tire Label 4-29 . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains
Safety 4
-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat Tire 5-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System Indicator Light 2-90 . . . . . . . . . . . . . . . . . . .
Checking Your Restraint Systems 1-88 . . . . . . . . . . . . . . . . . .
Chemical Paint Spotting 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Restraints 1-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Built-in 1-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Built-in 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing from a Built-in 1-67 . . . . . . . . . . . . . . . . . . . . . .
Securing in a Built-in 1-61 . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing in a Rear Outside Seat Position 1-76 . . . . . . . . . . .
Securing in the Center Seat Position (Bucket Seat) 1-80 . . . . .
Securing in the Center Seat Position
(Third Row Bench Seat) 1
-78 . . . . . . . . . . . . . . . . . . . . . .
Securing in the Right Front Seat Position 1-82 . . . . . . . . . .
Storing a Built-in 1-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where to Put 1-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 2-79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breakers and Fuses 6-57 . . . . . . . . . . . . . . . . . . . . . . .
Cleaner, Air 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .