When It Is Time For New Tyres - Cadillac XT4 2023 Owner's Manual

Reset the Tyre Pressure Monitor
System. See Tyre Pressure Monitor
Operation 0 291.
Check that all wheel nuts are properly
tightened. See Wheel Nut Torque
under Capacities and Specifications
0 335, and Removing the Flat Tyre and
Installing the Spare Tyre under Tyre
Changing 0 306.
Warning
Rust or dirt on a wheel, or on the
parts to which it is fastened, can
cause wheel nuts to become loose
over time. The wheel could come off
and cause a crash. When changing a
wheel, remove any rust or dirt from
places where the wheel attaches to
the vehicle. In an emergency, a cloth
or paper towel can be used; however,
use a scraper or wire brush
afterwards to remove all rust or dirt.
Lightly coat the inner diameter of the
wheel hub opening with wheel bearing
grease after a wheel change or tyre
rotation to prevent corrosion or rust
build-up.
Warning
Do not apply grease to the wheel
mounting surface, wheel conical
seats, or the wheel nuts or bolts.
Grease applied to these areas could
cause a wheel to become loose or
detach, resulting in a collision.

When It Is Time for New Tyres

Factors, such as maintenance, temperatures,
driving speeds, vehicle loading, and road
conditions affect the wear rate of the tyres.
Vehicle Care
Tread wear indicators are one way to tell
when it is time for new tyres. Tread wear
indicators appear when the tyres have only
1.6 mm (1/16 in) or less of tread remaining.
See Tyre Inspection 0 294 and
Tyre Rotation 0 294.
The rubber in tyres ages over time. This also
applies to the spare tyre, if the vehicle has
one, even if it is never used. Multiple factors
including temperatures, loading conditions,
and inflation pressure maintenance affect
how fast ageing takes place. GM
recommends that tyres, including the spare
if equipped, be replaced after six years,
regardless of tread wear. To identify the age
of a tyre, use the tyre manufacture date,
which consists of the last four digits of the
295