Vehicle Care
9-63
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.
All Passenger Car 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
a half (1½) 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.
Summary of Contents for GMC 2010 Terrain Navigation System
Page 6: ...vi Introduction 2 NOTES ...
Page 26: ...1 20 Keys Doors and Windows 2 NOTES ...
Page 88: ...2 62 Seats and Restraints 2 NOTES ...
Page 95: ...Instruments and Controls 4 3 2 NOTES ...
Page 96: ...4 4 Instruments and Controls Instrument Panel Overview ...
Page 104: ...4 12 Instruments and Controls Instrument Cluster United States Version Shown Canada Similar ...
Page 280: ...9 6 Vehicle Care Engine Compartment Overview 2 4L L4 Engine ...
Page 282: ...9 8 Vehicle Care 3 0L V6 Engine ...
Page 366: ...9 92 Vehicle Care 2 NOTES ...
Page 382: ...11 4 Technical Data Engine Drive Belt Routing 2 4L L4 Engine 3 0L V6 Engine ...