Uniform Tire Quality Grading
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration (NHTSA), 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 (UTQG)
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 speci ed
government test course. For example, a tire
graded 150 would wear one and a half (1.5) 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 signi cantly 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 speci ed 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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ProCarManuals.com
Fuses Usage
BLANK Not Used
4 Left High-Beam
BLANK Not Used
BLANK Not Used
BLANK Not Used
5 Not Used
6 Air Conditioning Clutch
7 Horn
8 Left Low-Beam
9Powertrain Control Module,
Electronic Throttle Control
10 Not Used
11 Transmission Solenoid
12 Right Low-Beam
13 Anti-lock Brake System
14 Powertrain Control Module IgnitionFuses Usage
15 Electronic Ignition
16 Fuel Injector
17Climate Control, RPA,
Cruise Control
18 Electronic Throttle Control
19 Engine Sensor, Evaporator
20 Airbag
21 Not Used
22 Not Used
23 Auxiliary Power
24 Front Windshield Washer
25 AC/DC Inverter
26 Rear Blower
27 Front Blower
28 Front Windshield Wiper
516
ProCarManuals.com