Cadillac 2009 DTS Owner's Manual page 356

(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) Dual Tire Maximum Load
that can be carried and the maximum pressure
needed to support that load when used in a dual
configuration.
(D) 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.
5-52
Maximum load
:
:
(E) Tire Identification Number (TIN)
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.
(F) Tire Ply Material
:
of plies in the sidewall and under the tread.
(G) Single Tire Maximum Load
that can be carried and the maximum pressure
needed to support that load when used as a single.
For information on recommended tire pressure see
Inflation - Tire Pressure on page 5-57.
The letters
:
The type of cord and number
Maximum load
: