GMC 2012 Savana Owner's Manual page 316

Vehicles that have a tire pressure
monitoring system could give an
inaccurate low pressure warning
if non TPC Spec rated tires are
installed. See
.
The Tire and Loading Information
label indicates the original
equipment tires on the vehicle. See
for the label location and more
information about the Tire and
Loading Information label.
If wheels or tires are installed that
are a different size than the original
equipment wheels and tires, vehicle
performance, including its braking,
ride and handling characteristics,
stability, and resistance to rollover
may be affected. If the vehicle has
electronic systems such as antilock
brakes, rollover airbags, traction
control, and electronic stability
control, the performance of these
systems can also be affected.
If different sized wheels are used,
there may not be an acceptable
level of performance and safety
if tires not recommended for
those wheels are selected. This
increases the chance of a crash
and serious injury. Only use GM
specific wheel and tire systems
developed for the vehicle, and
have them properly installed by a
GM certified technician.
See
and
additional information.
Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width. For
example:
The following information relates
to the system developed by the
United States National Highway
Traffic Safety Administration
(NHTSA), which grades tires
by treadwear, traction, and
temperature performance. This
applies only to vehicles sold in
the United States. The grades
for
are molded on the sidewalls of
most passenger car tires. The
Uniform Tire Quality Grading