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DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES
The following tire grading categories were established by
the National Highway Traffic Safety Administration. The
specific grade rating assigned by the tire’s manufacturer
in each category is shown on the sidewall of the tires on
your vehicle.
All passenger vehicle tires must conform to Federal
safety requirements in addition to these grades.
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 one-half
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 charac-
teristics and climate.
Traction Grades
The Traction grades, from highest to lowest, are AA, A, B,
and C. These 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 perfor-
mance.9
IF YOU NEED CONSUMER ASSISTANCE 405
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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 Grades
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 vehicle tires must meet under the Federal
Motor Vehicle Safety Standard No. 109. Grades B and Arepresent 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, under-inflation, or excessive load-
ing, either separately or in combination, can cause
heat buildup and possible tire failure.
406 IF YOU NEED CONSUMER ASSISTANCE
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Radiator Cap......................... .355
Selection Of Coolant (Antifreeze) ......353, 384, 385
Corrosion Protection ...................... .362
Cruise Light ............................ .172
Cupholders ............................ .139
Customer Assistance ...................... .399
Data Recorder, Event .......................72
Daytime Brightness, Interior Lights .............114
Daytime Running Lights ....................110
Dealer Service ........................... .339
Defroster, Rear Window .....................143
Defroster, Windshield .......................88
Delay (Intermittent) Wipers ..................114
Diagnostic System, Onboard .................336
Dimmer Switch, Headlight ...................112
Dipsticks Power Steering ........................ .260Disposal
Antifreeze (Engine Coolant) ................356
Door Ajar .............................. .161
Door Ajar Light ......................... .161
Door Locks ..............................26
Key Fob Emergency Key ...................24
Door Locks, Automatic ......................28
Door Opener, Garage ...................... .126
Doors ..................................26
Driving Through Flowing, Rising, Or Shallow Standing
Water ............................... .257
Electrical Outlet, Auxiliary (Power Outlet) ........135
Electric Remote Mirrors ......................98
Electronic Brake Control System ...............264
Traction Control System ...................267
Electronic Speed Control (Cruise Control) ........120
Electronic Stability Control (ESC) ..............267
10
INDEX 411
Page 424 of 427

Traction............................... .256
Traction Control ......................... .267
Trailer Towing ...........................311
Transmission ........................... .360
Fluid ............................... .387
Shifting .......................... .247, 250
Transmitter Battery Service (Remote Keyless Entry) . .24
Transmitter Programming (Remote Keyless Entry) . . .24
Transmitter, Remote Keyless Entry (RKE) .........21
Transporting Pets ..........................84
Tread Wear Indicators ..................... .291
Turn Signals ..........................111,171
Uconnect Operation ............................ .209
Uconnect 8.4A/8.4AN Voice Recognition Additional Information ...................240
Do Not Disturb ....................... .238
Siri Eyes Free ......................... .238Uconnect Access
Vehicle Health Alert .....................232
Uconnect Settings ..........................29
Uconnect Voice Command ...................221
Uniform Tire Quality Grades .................405
Universal Transmitter ..................... .126
Unleaded Gasoline ....................... .302
Untwisting Procedure, Seat Belt ................42
Upholstery Care ......................... .366
Vanity Mirrors ............................99
Vehicle Identification Number (VIN) .............6
Vehicle Loading ......................... .279
Vehicle Modifications/Alterations ...............7
Vehicle Security Alarm (Security Alarm) ..........18
Vehicle Storage ....................... .219, 379
Vinyl Trim ............................. .366
Viscosity, Engine Oil ....................342, 384
422 INDEX
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