1999 BUICK RIVIERA spare tire

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6-41
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.
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.

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6-43 Buying New Tires
To find out what kind and size of tires you need, look at
the Tire
-Loading Information label.
The tires installed on your vehicle when it was new had
a Tire Performance Criteria Specification (TPC Spec)
number on each tire's sidewall. When you get new tires,
get ones with that same TPC Spec number. That way
your vehicle will continue to have tires that are designed
to give proper endurance, handling, speed rating,
traction, ride and other things during normal service on
your vehicle. If your tires have an all
-season tread
design, the TPC number will be followed by an ªMSº
(for mud and snow).
If you ever replace your tires with those not having a
TPC Spec number, make sure they are the same size,
load range, speed rating and construction type (bias,
bias
-belted or radial) as your original tires.
CAUTION:
Mixing tires could cause you to lose control while
driving. If you mix tires of different sizes or types
(radial and bias
-belted tires), the vehicle may not
handle properly, and you could have a crash.
Using tires of different sizes may also cause
damage to your vehicle. Be sure to use the same
size and type tires on all wheels.
It's all right to drive with your compact spare,
though. It was developed for use on your vehicle.
CAUTION:
If you use bias-ply tires on your vehicle, the
wheel rim flanges could develop cracks after
many miles of driving. A tire and/or wheel could
fail suddenly, causing a crash. Use only radial
-ply
tires with the wheels on your vehicle.

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6-44 Uniform Tire Quality Grading
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration, which grades tires by
treadwear, traction and temperature performance. (This
applies only to vehicles sold in the United States.) The
grades are molded on the sidewalls of most passenger
car tires. The Uniform Tire Quality Grading system does
not apply to deep tread, winter
-type snow tires,
space
-saver or temporary use spare tires, tires with
nominal rim diameters of 10 to 12 inches (25 to 30 cm),
or to some limited
-production tires.
While the tires available on General Motors passenger
cars and light trucks may vary with respect to these
grades, they must also conform to Federal safety
requirements and additional General Motors Tire
Performance Criteria (TPC) standards.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.

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6-56
Vehicle Identification Number (VIN)
This is the legal identifier for your vehicle. It appears on
a plate in the front corner of the instrument panel, on the
driver's side. You can see it if you look through the
windshield from outside your vehicle. The VIN also
appears on the Vehicle Certification and Service Parts
labels and the certificates of title and registration.
Engine Identification
The 8th character in your VIN is the engine code. This
code will help you identify your engine, specifications
and replacement parts.
Service Parts Identification Label
You'll find this label on the underside of the spare tire
cover. It's very helpful if you ever need to order parts.
On this label is:

your VIN,

the model designation,

paint information and

a list of all production options and
special equipment.
Be sure that this label is not removed from the vehicle.

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9-3
Stains 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vinyl 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheels 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield and Wiper Blades 6-51 . . . . . . . . . . . . . . . . . . .
Wood Panels 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Climate Control System 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Zone 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Wheel Control 3-9 . . . . . . . . . . . . . . . . . . . . . . . . .
Clock, Setting the 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Comfort Controls 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Zone 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Wheel Control 3-9 . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Disc
Care 3
-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Player 3-10, 3-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Player Care 3-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Spare Tire 5-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console Storage 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control of a Vehicle 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convenience Net 2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convex Outside Mirror 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 6-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater, Engine 2-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recovery Tank 5-11, 5-13 . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling System 5-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cornering Lamps 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Lamps 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Transportation 8-7 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cruise Light 2
-78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cupholders 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer Assistance
For Text Telephone Users 8
-4 . . . . . . . . . . . . . . . . . . . . . . .
Information 8-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Offices 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer Satisfaction Procedure 8-2 . . . . . . . . . . . . . . . . . . . .
Damage, Finish 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage, Sheet Metal 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps (DRL) 2-41 . . . . . . . . . . . . . . . . . . .
Dead Battery 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defects, Reporting Safety 8-9 . . . . . . . . . . . . . . . . . . . . . . . . .
Defensive Driving 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defogger, Rear Window 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . .
Defogging 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrosting 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delayed Entry Lighting 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . .
Delayed Exit Lighting 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delayed Locking 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions, Vehicle 6-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door
Ajar Light 2
-78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ajar Reminder 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Central Unlocking System 2-4 . . . . . . . . . . . . . . . . . . . . . . .
Locks 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks, Delayed Locking 2-7 . . . . . . . . . . . . . . . . . . . . . . . .
Memory Locks 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Position 1-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-10
Security Feedback 2-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security Light 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security System, PASS-Key
II 2-17 . . . . . . . . . . . . . . . . . . .
Service 6-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulletins, Ordering 8-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Soon Light 2-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manuals, Ordering 8-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Identification Label 6-56 . . . . . . . . . . . . . . . . . . . . . . .
Publications, Ordering 8-10, 8-11 . . . . . . . . . . . . . . . . . . . .
Work, Doing Your Own 6-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Service and Appearance Care 6-1 . . . . . . . . . . . . . . . . . . . . . .
Service and Owner Publications 8-10, 8-11 . . . . . . . . . . . . . .
Service Publications 8-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Your Air Bag-Equipped Vehicle 1-27 . . . . . . . . . . .
Sheet Metal Damage 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting
Into PARK (P) 2
-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Out of PARK (P) 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shoulder Belt Tightness Adjustment 1-15 . . . . . . . . . . . . . . . .
Signaling Turns 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Skidding 4-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sound Equipment, Adding 3-19 . . . . . . . . . . . . . . . . . . . . . . . .
Spare Tire, Compact 5-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speaker Covers, Cleaning 6-50 . . . . . . . . . . . . . . . . . . . . . . . .
Specifications and Capacities 6-66 . . . . . . . . . . . . . . . . . . . . . .
Specifications, Engine 6-67 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speech Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . . .
Speedometer 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS 1-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stains, Cleaning 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Switch Check 7-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steam 5
-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Emergencies 4-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Magnasteer
4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel, Tilt 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Wheel Touch Controls 3-9, 3-17 . . . . . . . . . . . . . . . .
Storage Compartments 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Vehicle 6-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stuck: In Sand, Mud, Ice or Snow 5-28 . . . . . . . . . . . . . . . . . .
Sun Visors 2-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunroof (Astroroof) 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supercharged Engine 6-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supercharger Oil 6-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplemental Restraint System 1-21 . . . . . . . . . . . . . . . . . . . .
Symbols, Vehicle v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillamp Bulb Replacement 6-35 . . . . . . . . . . . . . . . . . . . . . . .
Tape Player Care 3-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Button, Climate Control System 3-3 . . . . . . . . . .
Theater Dimming 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft-Deterrent Feature 3-15 . . . . . . . . . . . . . . . . . . . . . . . . . .
THEFTLOCK
3-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 6-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tilt Steering Wheel 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time, Setting the 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Chains 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Loading 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-11
Tire-Loading Information Label 4-30 . . . . . . . . . . . . . . . . . . .
Tires 6-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance 6-45 . . . . . . . . . . . . . . . . . . . . . . . .
Buying New 6-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat 5-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Spare 5-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation 6-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation Check 7-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-41 . . . . . . . . . . . . . . . . . . . . . . . .
Loading Your Vehicle 4-30 . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure 6-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treadwear 6-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-44 . . . . . . . . . . . . . . . . . . . . . . .
Wear Indicators 6-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Replacement 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When It's Time for New 6-42 . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Lock 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque, Wheel Nut 5-24, 6-66 . . . . . . . . . . . . . . . . . . . . . . . . .
Towing a Trailer 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing, Recreational Vehicle 4-29 . . . . . . . . . . . . . . . . . . . . .
Towing Your Vehicle 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction
Control System 4
-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control System Warning Light 2-71, 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 6-18 . . . . . . . . . . . . . . . . . . . . . . .
Transmitter
Remote Keyless Entry 2
-8 . . . . . . . . . . . . . . . . . . . . . . . . . .
Universal 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transportation, Courtesy 8-7 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trip Odometer 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trunk
Lock 2
-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Release Lockout, Remote 2-14 . . . . . . . . . . . . . . . . . . . . . .
Release, Remote 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security Override 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTY Users 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn and Lane Change Signals 2-35 . . . . . . . . . . . . . . . . . . . .
Turn Signal Reminder 2-36 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal/Multifunction Lever 2-35 . . . . . . . . . . . . . . . . . . .
Turn Signals When Towing a Trailer 4-37 . . . . . . . . . . . . . . . .
Twilight Sentinel
2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .