Buick 2013 Regal Owner's Manual page 296

and service description. See the
Tire Size illustration later in this
section.
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.
The
Department of Transportation
(DOT) code indicates that the
tire is in compliance with the
U.S. Department of
Transportation Motor Vehicle
Safety Standards.
The last four
digits of the TIN indicate the tire
manufactured date. The first two
digits represent the week (01
52) and the last two digits, the
year. For example, the third
week of the year 2010 would
have a four-digit DOT date
of 0310.
The letters and
numbers following the DOT
(Department of Transportation)
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.
of cord and number of plies in
the sidewall and under the tread.
Tire
manufacturers are required to
grade tires based on three
performance factors: treadwear,
traction, and temperature
resistance. For more information
see
can be carried and the
maximum pressure needed to
support that load.
The type
of cord and number of plies in
the sidewall and under the tread.
.
Maximum load that
The type