Cadillac 2013 Caddilac CTS Owner's Manual page 377

See
and
.
Reset the Tire Pressure Monitor
System. See
.
Check that all wheel nuts are
properly tightened. See Wheel
Nut Torque under
.
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 center of the
wheel hub with wheel bearing
grease after a wheel change or
tire 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.
Factors such as maintenance,
temperatures, driving speeds,
vehicle loading, and road conditions
affect the wear rate of the tires.
(Continued)
Treadwear indicators are one way to
tell when it is time for new tires.
Treadwear indicators appear when
the tires have only 1.6 mm (1/16 in)
or less of tread remaining. See
The rubber in tires ages over
time. This also applies to the
spare tire, if the vehicle has one,
even if it is never used. Multiple
factors including temperatures,
loading conditions, and inflation
pressure maintenance affect
how fast aging takes place.
and
.