Cadillac 2007 CTS, Owner'S Manual, Page: 405 / 518

The high-performance tires, size P225/55R16,
P225/50R17 or P2225/50R18 require inflation
pressure adjustment when driving your vehicle at
speeds of 100 mph (160 km/h) or higher. Set
the cold tire inflation pressure to the maximum
inflation pressure shown on the tire sidewall,
or 38 psi (262 kPa), whichever is lower. See the
example following.
Example:
You will find the maximum load and inflation
pressure molded on the tire’s sidewall, in small
letters, near the rim flange. It will read something
like this: Maximum load 710 kg (1565 lbs)
350 kPa (51 psi) Max. Press.
For this example, you would set the cold
inflation pressure for high-speed driving at
38 psi (262 kPa)
When you end high-speed driving, return the tires
to the cold inflation pressures shown on the
tire and loading information label. See
Loading
Your Vehicle on page 321 .
Tire Pressure Monitor System
Your vehicle may have a Tire Pressure Monitor
System (TPMS). This system uses radio and
sensor technology to check tire pressure levels.
If your vehicle has this feature, sensors are
mounted on each the tire and wheel assembly,
except for the spare tire. The TPMS sensors
monitor the air pressure in the vehicle’s tires and
transmits the tire pressure readings to a receiver
located in the vehicle.
If your vehicle has the base audio system, the
Driver Information Center (DIC) displays TPMS
warnings and messages on the radio’s display
screen. See
System Controls on page 218
and DIC Warnings and Messages on page 228 for
additional information and details about the DIC
operation and displays. If your vehicle has
the Navigation system, TPMS warnings and
messages are displayed on the message center
screen, located inside the tachometer. See
Message Center (CTS-V) on page 209 for
information about the message center operation
and displays.
405