Cadillac CTS 2013 Owner's Manual page 344

10-68 Vehicle Care
Tyres are rotated to achieve a
uniform wear for all tyres. The
first rotation is the most
important.
Anytime unusual wear is
noticed, rotate the tyres as soon
as possible, check for proper
tyre inflation pressure, and
check for damaged tyres or
wheels. If the unusual wear
continues after the rotation,
check the wheel alignment. See
When It Is Time for New Tyres
on page 10 69 and Wheel
Replacement on page 10 72.
Directional tyres should not be
rotated. Each tyre and wheel
should be used only in the
position it is in. Directional tyres
will have an arrow on the tyre
indicating the proper direction of
rotation or will have left or
right moulded on the sidewall.
Use this rotation pattern if the
vehicle has different size tyres
on the front and rear and they
are non-directional.
Different tyre sizes should not
be rotated front to rear.
Use this rotation pattern when
rotating tyres of the same size
installed on all four wheel
positions.
If the vehicle has a compact
spare tyre, do not include it in
the tyre rotation.