Buying New Tyres - Cadillac XT4 2023 Owner's Manual

296 Vehicle Care
DOT Tyre Identification Number (TIN)
moulded into one side of the tyre sidewall.
The last four digits of the TIN indicate the
tyre manufacture date. The first two digits
indicate the week and the last two digits,
the year. For example, the third week of the
year 2020 would have a 4-digit DOT date of
0320. Week 01 is the first full week (Sunday
to Saturday inclusive) of each year.
Vehicle Storage
Tyres age when stored normally mounted
on a parked vehicle. Park a vehicle that will
be stored for at least a month in a cool, dry,
clean area away from direct sunlight to slow
ageing. This area should be free of grease,
petrol, or other substances that can
deteriorate rubber.
Parking for an extended period can cause
flat spots on the tyres that may result in
vibrations while driving. When storing a
vehicle for at least a month, remove the
tyres or raise the vehicle to reduce the
weight from the tyres.

Buying New Tyres

GM has developed and matched specific
tyres for the vehicle. The original
equipment tyres installed were
designed to meet General Motors Tyre
Performance Criteria Specification (TPC
Spec) system rating. When replacement
tyres are needed, GM strongly
recommends buying tyres with the
same TPC Spec rating.
GM's exclusive TPC Spec system
considers over a dozen critical
specifications that impact the overall
performance of the vehicle, including
brake system performance, ride and
handling, traction control, and tyre
pressure monitoring performance. GM's
TPC Spec number is moulded onto the
tyre's sidewall near the tyre size. If the
tyres have an all-season tread design,
the TPC Spec number will be followed
by MS for mud and snow.
GM recommends replacing worn tyres
in complete sets of four. Uniform tread
depth on all tyres will help to maintain
the performance of the vehicle. Braking
and handling performance may be
adversely affected if all the tyres are
not replaced at the same time. If proper
rotation and maintenance have been
done, all four tyres should wear out at
about the same time. However, if it is
necessary to replace only one axle set
of worn tyres, place the new tyres on
the rear axle. See Tyre Rotation 0 294.
Warning
Tyres could explode during improper
service. Attempting to mount or
dismount a tyre could cause injury or
death. Only your dealer or authorised
tyre service centre should mount or
dismount the tyres.
Warning
Mixing tyres of different sizes (other
than those originally installed on the
vehicle), brands, tread patterns or
types may cause loss of control of
the vehicle, resulting in a crash or
other vehicle damage. Use the
correct size, brand, and type of tyre
on all wheels.