tires CADILLAC DEVILLE 1999 7.G Owner's Guide

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6-48
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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6-49 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.

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6-50
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.
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can't know how it's been used or
how far it's been driven. It could fail suddenly
and cause an accident. If you have to replace a
wheel, use a new GM original equipment wheel.
Tire Chains
NOTICE:
Use tire chains only where legal and only when
you must. Use only SAE Class ªSº type chains
that are the proper size for your tires. Install
them on the front tires and tighten them as
tightly as possible with the ends securely
fastened. Drive slowly and follow the chain
manufacturer's instructions. If you can hear the
chains contacting your vehicle, stop and retighten
them. If the contact continues, slow down until it
stops. Driving too fast or spinning the wheels
with chains on will damage your vehicle.

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6-55
Exterior painted surfaces are subject to aging, weather
and chemical fallout that can take their toll over a period
of years. You can help to keep the paint finish looking
new by keeping your vehicle garaged or covered
whenever possible.
Cleaning Aluminum or
Chrome
-Plated Wheels (If Equipped)
Keep your wheels clean using a soft clean cloth with
mild soap and water. Rinse with clean water. After
rinsing thoroughly, dry with a soft clean towel. A wax
may then be applied.
The surface of these wheels is similar to the painted
surface of your vehicle. Don't use strong soaps,
chemicals, abrasive polishes, abrasive cleaners, cleaners
with acid or abrasive cleaning brushes on them because
you could damage the surface. Do not use chrome polish
on any wheels other than chrome
-plated wheels.
Use chrome polish only on chrome
-plated wheels, but
avoid any painted surface of the wheel, and buff off
immediately after application.
Don't take your vehicle through an automatic car wash
that has silicon carbide tire cleaning brushes. These
brushes can also damage the surface of these wheels.
Cleaning Tires
To clean your tires, use a stiff brush with a tire cleaner.
NOTICE:
When applying a tire dressing always take care to
wipe off any overspray or splash from all painted
surfaces on the body or wheels of the vehicle.
Petroleum
-based products may damage the paint
finish and tires.
Sheet Metal Damage
If your vehicle is damaged and requires sheet metal
repair or replacement, make sure the body repair shop
applies anti
-corrosion material to the parts repaired or
replaced to restore corrosion protection.

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8-3
Checking Engine Oil 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Things Under the Hood 6-8 . . . . . . . . . . . . . . . . . . .
Checking Your Restraint Systems 1-53 . . . . . . . . . . . . . . . . . .
Chemical Paint Spotting 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Restraints 1-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing in a Rear Outside Seat Position 1-43 . . . . . . . . . . .
Securing in the Center Rear Seat Position 1-45 . . . . . . . . . .
Securing in the Right Front Seat Position 1-47 . . . . . . . . . .
Top Strap 1-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where to Put 1-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHMSL 6-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chrome-Plated Wheels, Cleaning 6-55 . . . . . . . . . . . . . . . . . .
Cigarette Lighter 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breakers and Fuses 6-63 . . . . . . . . . . . . . . . . . . . . . . .
City Driving 4-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning
Aluminum or Chrome
-Plated Wheels 6-55 . . . . . . . . . . . . .
Exterior Lamps/Lenses 6-54 . . . . . . . . . . . . . . . . . . . . . . . .
Fabric/Carpet 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glass Surfaces 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside of Your Vehicle 6-51 . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Plastic Components 6-52 . . . . . . . . . . . . . . . . . . . . .
Leather 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside of the Windshield and Wiper Blades 6-53 . . . . . . .
Outside of Your Vehicle 6-54 . . . . . . . . . . . . . . . . . . . . . . . .
Speaker Covers 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vinyl 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheels 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wood Panels 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Climate Control
Personalization 3
-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Wheel Controls 3-13 . . . . . . . . . . . . . . . . . . . . . . .
System 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock, Setting the 3-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coinholder (Front Storage Area) 2-53 . . . . . . . . . . . . . . . . . . .
Comfort Controls 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Comfort Controls and Radio System Personalization 2-94 . . .
Compact Disc Care 3-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Disc Player Care 3-40 . . . . . . . . . . . . . . . . . . . . . . . .
Compact Disc Players 3-21, 3-30 . . . . . . . . . . . . . . . . . . . . . .
Compact Spare Tire 5-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compartments, Storage 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . .
Compass, Rearview Mirror with 2-49 . . . . . . . . . . . . . . . . . . .
Console Shift Lever 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continual Variable Road Sensing Suspension 2-95 . . . . . . . . .
Control of a Vehicle 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control System, Traction 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . .
Convenience Net 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convex Outside Mirror 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 6-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater, Engine 2-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Surge Tank 5-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling System 5-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cornering Lamps 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Lamps 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Transportation 7-8 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Engaged Message 2-84 . . . . . . . . . . . . . . . . . . . . . . . . .
Cupholders (in Storage Areas) 2-53, 2-54 . . . . . . . . . . . . . . . .
Curb View Assist Mirror 2-52, 2-93 . . . . . . . . . . . . . . . . . . . .

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8-10
Replacement
Bulbs (Part Numbers) 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Maintenance Parts 6-70 . . . . . . . . . . . . . . . . . . . . . .
Wheel 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Safety Belts 1-53 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reporting Safety Defects 7-10, 7-11 . . . . . . . . . . . . . . . . . . . .
Restraints
Checking 1
-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Child 1-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Parts After a Crash 1-53 . . . . . . . . . . . . . . . . . . .
Resynchronization (Remote Keyless Entry) 2-10 . . . . . . . . . .
Retained Accessory Power 2-19 . . . . . . . . . . . . . . . . . . . . . . . .
Reverse, Automatic Transaxle 2-24 . . . . . . . . . . . . . . . . . . . . .
Right Front Passenger Position 1-21 . . . . . . . . . . . . . . . . . . . .
RKE 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roadside Assistance (Service) 7-5 . . . . . . . . . . . . . . . . . . . . . .
Rocking Your Vehicle 5-30 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotation, Tires 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belts 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adults 1-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Care 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Center Passenger Position 1-29 . . . . . . . . . . . . . . . . . . . . . .
Children 1-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Position 1-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extender 1-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Wear Properly 1-12 . . . . . . . . . . . . . . . . . . . . . . . . .
Incorrect Usage 1-16, 1-51, 1-52 . . . . . . . . . . . . . . . . . . . .
Lap-Shoulder 1-12, 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . Larger Children 1
-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Questions and Answers 1-11 . . . . . . . . . . . . . . . . . . . . . . . .
Rear Seat Outside Passenger Positions 1-31 . . . . . . . . . . . .
Rear Seat Passengers 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . .
Reminder Light 1-7, 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing After a Crash 1-53 . . . . . . . . . . . . . . . . . . . . . . . .
Right Front Passenger Position 1-21 . . . . . . . . . . . . . . . . . .
Shoulder Belt Height Adjuster 1-14 . . . . . . . . . . . . . . . . . . .
Shoulder Belt Tightness Adjustment 1-14 . . . . . . . . . . . . . .
Smaller Children and Babies 1-34 . . . . . . . . . . . . . . . . . . . .
Use During Pregnancy 1-20 . . . . . . . . . . . . . . . . . . . . . . . . .
Why They Work 1-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Defects, Reporting 7-10, 7-11 . . . . . . . . . . . . . . . . . . .
Safety Warnings and Symbols iii. . . . . . . . . . . . . . . . . . . . . . .
Seatback, Reclining Front 1
-4 . . . . . . . . . . . . . . . . . . . . . . . . .
Seats
Controls 1
-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Front 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Control 1-2, 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Function 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restraint Systems 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing a Child Restraint 1-43, 1-45, 1-47 . . . . . . . . . . . .
Second Gear, Automatic Transaxle 2-25 . . . . . . . . . . . . . . . . .
Security System 2-15, 2-17 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 6-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A/C System Message 2-87 . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag System Message 2-87 . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care 6-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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8-12
Tachometer 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillamps, Bulb Replacement 6-40 . . . . . . . . . . . . . . . . . . . . .
Tape Player Care 3-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tapes, Playing Cassettes 3-16, 3-19, 3-28 . . . . . . . . . . . . . . .
Telephone, Cellular 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Controls 3-3, 3-6 . . . . . . . . . . . . . . . . . . . . . . . . .
Theft 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft System Problem/Car May Not Restart Message 2-88 . .
Theft-Deterrent Feature, Radio 3-37 . . . . . . . . . . . . . . . . . . . .
Theft-Deterrent System (Vehicle Alarm) 2-15 . . . . . . . . . . . . .
Thermostat 6-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Gear, Automatic Transaxle 2-25 . . . . . . . . . . . . . . . . . . .
Tilt Wheel 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time, Setting the 3-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips About Your Audio System 3-38 . . . . . . . . . . . . . . . . . . . .
Tire Chains 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire-Loading Information Label 4-30 . . . . . . . . . . . . . . . . . . .
Tires 6-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance 6-49 . . . . . . . . . . . . . . . . . . . . . . . .
Buying New 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat 5-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Spare 5-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation Pressure 6-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-45 . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 Speed - Fuel Off Message 2-88 . . . . . . . . . . . . . . . . . . . .
Top Strap 1-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Lock 2-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque, Wheel Nut 5-26, 6-70 . . . . . . . . . . . . . . . . . . . . . . . . .
Towing
a Trailer 4
-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recreational Vehicle 4-29 . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Vehicle 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction
Control System 4
-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control System Warning Light 2-72, 4-9 . . . . . . . . . . . . . .
Engaged Message 2-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off Message 2-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ready Message 2-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspended Message 2-89 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer
Brakes 4
-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving on Grades 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving with 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling When Towing 4-39 . . . . . . . . . . . . . . . . . . .
Hitches 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Towing 4-39 . . . . . . . . . . . . . . . . . . . . .
Parking on Hills 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tongue Weight 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Weight on Tires 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . .