Hummer 2010 H3 Owner's Manual page 311

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and service description. See the
Tire Size illustration later in this
section for more detail.
(B) TPC Spec (Tire
Performance Criteria
Specification) Original
:
equipment tires designed to
GM's specific tire performance
criteria have a TPC specification
code molded onto the sidewall.
GM's TPC specifications meet
or exceed all federal safety
guidelines.
(C) DOT (Department of
Transportation) The
:
Department of Transportation
(DOT) code indicates that
the tire is in compliance with
the U.S. Department of
Transportation Motor Vehicle
Safety Standards.
(D) Tire Identification Number
(TIN) The letters and numbers
:
following DOT code are the Tire
Identification Number (TIN).
The TIN shows the
manufacturer and plant code,
tire size, and date the tire
was manufactured. The TIN is
molded onto both sides of the
tire, although only one side may
have the date of manufacture.
(E) Tire Ply Material
:
of cord and number of plies in
the sidewall and under the tread.
(F) Uniform Tire Quality
Grading (UTQG) Tire
:
manufacturers are required
to grade tires based on
three performance factors:
treadwear, traction, and
temperature resistance.
For more information, see
Uniform Tire Quality Grading on
page 10 61.
(G) Maximum Cold Inflation
Load Limit Maximum load
:
that can be carried and the
maximum pressure needed
to support that load.
Vehicle Care
For information on
recommended tire pressure
see Tire Pressure on page 10 51
and Vehicle Load Limits on
page 9 27.
The type
Light Truck (LT-Metric) Tire
(A) Tire Size
code is a combination of letters
and numbers used to define a
particular tire's width, height,
aspect ratio, construction type,
and service description. See the
Tire Size illustration later in this
section for more detail.
10-45
The tire size
: