2007 Cadillac STS Owner's Manual - Page 433

If you will be driving at high speeds, speeds of 100 mph (160 km/h) or higher, where it is legal, set the cold inflation pressure to the maximum inflation pressure shown on the tire sidewall, or 38 psi (265 kPa), whichever is lower. See the example following. When you end this high-speed driving, return the tires to the cold inflation pressure shown on the Tire and Loading Information label. See Loading Your Vehicle on page 349. 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 690 kg (1521 lbs) 300 kPa (44 psi) Max. Press. For this example, you would set the inflation pressure for high-speed driving at 38 psi (265 kPa). Tire Pressure Monitor System Your vehicle has a Tire Pressure Monitor System (TPMS). This system uses radio and sensor technology to check tire pressure levels. Sensors are mounted onto each tire and wheel assembly, except the compact spare tire and wheel. The TPMS sensors monitor the air pressure in your vehicle's tires and transmits the tire pressure readings to a receiver located in the vehicle. Using the Driver Information Center (DIC), tire pressure levels may be viewed by the driver. For additional information and details about the DIC operation and displays see DIC Controls and Displays on page 258 and DIC Warnings and Messages on page 264. If a low tire pressure condition is detected, the TPMS will display the CHECK TIRE PRESSURE warning message on the DIC display and, at the same time, illuminate the low tire pressure warning symbol, on the instrument panel cluster. 433