When It Is Time For New; Tyres - Cadillac XT5 2017 Owner's Manual

272 VEHICLE CARE
Reset the Tyre Pressure Monitor
System. See Tyre Pressure Monitor
Operation 0 268.
Check that all wheel nuts are
properly tightened. See Wheel
Nut Torque under Capacities and
Specifications 0 309.
Warning
Rust or dirt on a wheel, or on the
parts to which it is fastened, can
make wheel nuts become loose
after time. The wheel could come
off and cause an accident. When
changing a wheel, remove any rust
or dirt from places where the wheel
attaches to the vehicle. In an
emergency, a cloth or a paper towel
can be used; however, use a scraper
or wire brush later to remove all
rust or dirt.
Lightly coat the centre of the
wheel hub with wheel bearing
grease after a wheel change or tyre
rotation to prevent corrosion or
rust build-up. Do not get grease
on the flat wheel mounting
surface or on the wheel nuts or
bolts.

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.
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 0 271 and Tyre
Rotation 0 271.
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. The
tyre manufacture date is the last four
digits of the DOT Tyre Identification
Number (TIN) which is moulded into
one side of the tyre sidewall. 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.
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