1999 CHEVROLET SILVERADO wheel alignment

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6-47 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 one of the correct
rotation patterns shown here.
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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6-51
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.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.

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9-1
Section 9 Index
A
ccessory Power Outlet 2-65 . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment to the Outside of Your Vehicle 6-3 . . . . . .
Air Bag 1-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment 1-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-29 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off Light 1-33, 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off Switch 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-27, 2-71 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-29 . . . . . . . . . . . . . . . . . . . . . . . . . .
What Will You See After it Inflates 1-29 . . . . . . . . . . . . . . .
When Should it Inflate 1-28 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner Filter, Engine 6-16 . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner Filter Restriction Indicator Check 7-19 . . . . . . . .
Air Conditioning 3-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-76 . . . . . . . . . . . . . . . . . . . . .
Air Dam Removal 4-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Dam Replacement 4-16 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter, Passenger Compartment 3-5, 6-18, 6-77 . . . . . . . .
Alignment and Balance, Tire 6-51 . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-59 . . . . . . . . . . . . . . . . . . . . . .
Antenna 3-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antifreeze 6-29, 6-75, 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock
Brake System Warning Light 2-74, 4-7 . . . . . . . . . . . . . . . .
Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appearance Care 6
-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care and Materials 6-62 . . . . . . . . . . . . . . . . . . . .
Arbitration Program 8-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Armrest Storage Compartment 2-64 . . . . . . . . . . . . . . . . . . . .
Ashtrays 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Equipment, Adding 3-26 . . . . . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Transmission
Check 7
-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-19, 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Park Mechanism Check 7-22 . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-16 . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auxiliary Battery 4-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auxiliary Roof Mounted Lamp Switch 2-54 . . . . . . . . . . . . . .
Axle, Front 6-27, 7-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Locking Rear 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Rear 6-25, 7-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery 6-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auxiliary 4-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Message 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Keyless Entry 2-7 . . . . . . . . . . . . . . . . . . . . .
Run-Down Protection 2-56 . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 5-3, 5-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBB Auto Line 8-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-10
Servicing Your Air Bag-Equipped Vehicle 1-34 . . . . . . . . . . .
Sheet Metal Damage 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lever 2-20, 2-24, 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Light 2-27, 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Speeds 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Into Park (P) 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting, Manual Transmission 2-24, 2-25 . . . . . . . . . . . . . . .
Shifting Out of Park (P) 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . .
Signaling Turns 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Skidding 4-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Snow Plow Prep Package 1-35, 2-54, 4-46, 4-49, 6-72 . . . . .
Sound Equipment, Adding 3-26 . . . . . . . . . . . . . . . . . . . . . . . .
Specifications and Capacities 6-74 . . . . . . . . . . . . . . . . . . . . . .
Specifications, Engine 6-74 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speech Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . . .
Speedometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stains, Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Switch Check 7-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-16, 2-18 . . . . . . . . . . . . . . . . . . . . . . .
Steam 5-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Emergencies 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel, Tilt 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step-Bumper Pad 4-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Areas 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Overhead 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Vehicle 6-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stuck: In Sand, Mud, Ice or Snow 5-33 . . . . . . . . . . . . . . . . . .
Sun Visors 2-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunglasses Storage 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Surge Tank, Coolant 5
-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch, Auxiliary Roof Mounted Lamp 2-54 . . . . . . . . . . . . .
Symbols, Vehicle v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate 2-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Removal 2-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillamp Bulb Replacement 6-42, 6-44 . . . . . . . . . . . . . . . . . .
Tape Player Care 3-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Control, Climate Control System 3-2, 3-3 . . . . .
Theft 2-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft-Deterrent Feature 3-23 . . . . . . . . . . . . . . . . . . . . . . . . . .
THEFTLOCK
3-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 6-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Door 2-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tilt Steering Wheel 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time, Setting the 3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Chains 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Loading 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance 6-51 . . . . . . . . . . . . . . . . . . . . . . . .
Buying New 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat 5-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation Check 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-47 . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-12
Warning Devices 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Lights, Gages and Indicators 2-70 . . . . . . . . . . . . . . .
Warranty Information 8-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid, Windshield 6-33, 7-25 . . . . . . . . . . . . . . . . . . .
Washing Your Vehicle 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrip Lubrication 7-19 . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrips 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel
Alignment 6
-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nut Torque 5-30, 6-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sliding Rear 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Swing-Out 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Windshield Washer 2
-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 2-47, 6-33, 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Level Check 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Wipers 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Replacement 6-44, 6-77 . . . . . . . . . . . . . . . . . . . . . .
Cleaning the Blades 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 6-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter Driving 4-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blade Check 7-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blades, Cleaning 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring, Trailer 4-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Harness, Instrument Panel Jumper 4-69 . . . . . . . . . . . .
Wrench, Wheel 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .