Summer Tires; Tire Sidewall Labeling - GMC XT5 2023 Owner's Manual

378 Vehicle Care
winter tire availability and
proper tire selection. Also, see
Buying New Tires 0 395.
With winter tires, there may
be decreased dry road
traction, increased road noise,
and shorter tread life. After
changing to winter tires, be
alert for changes in vehicle
handling and braking.
If using winter tires:
Use tires of the same brand
and tread type on all four
wheel positions.
Use only radial ply tires of
the same size, load range,
and speed rating as the
original equipment tires.
Winter tires with the same
speed rating as the original
equipment tires may not be
available for H, V, W, Y, and ZR
speed rated tires. If winter
tires with a lower speed rating
are chosen, never exceed the
tire's maximum speed
capability.

Summer Tires

This vehicle may come with
235/55R20 high performance
summer tires. These tires have
a special tread and compound
that are optimized for
maximum dry and wet road
performance. This special
tread and compound will have
decreased performance in
cold climates, and on ice and
snow. It is recommended that
winter tires be installed on the
vehicle if frequent driving at
temperatures below
approximately 5 °C (40 °F) or
on ice or snow covered roads
is expected. See Winter Tires
0 377.
Caution
High performance summer
tires have rubber
compounds that lose
flexibility and may develop
surface cracks in the tread
area at temperatures below
7 °C (20 °F). Always store
(Continued)
Caution (Continued)
high performance summer
tires indoors and at
temperatures above 7 °C
(20 °F) when not in use. If the
tires have been subjected to
7 °C (20 °F) or less, let them
warm up in a heated space
to at least 5 °C (40 °F) for
24 hours or more before
being installed or driving a
vehicle on which they are
installed. Do not apply heat
or blow heated air directly
on the tires. Always inspect
tires before use. See Tire
Inspection 0 392.

Tire Sidewall Labeling

Useful information about a
tire is molded into its
sidewall. The examples
show a typical passenger
vehicle tire and a compact
spare tire sidewall.