2007 Cadillac STS Owner's Manual - Page 430

If a tire goes flat, you will not need to stop on the side of the road to change the tire. You can just keep on driving. The vehicle's run-flat tires can operate effectively with no air pressure for up to 50 miles (80 km) at speeds up to 55 mph (90 km/h). The shorter the distance you drive and the slower the speed, the greater the chance that the tire will not have to be replaced. When a tire is filled with air, it provides a cushion between the road and the wheel. Because you will not have this cushion when driving on a deflated run-flat tire, try to avoid potholes that could damage your wheel and require replacement of it. Some road hazards can damage a tire beyond repair. This damage could occur even before you have driven on the tire in a deflated condition. When a tire has been damaged, or if you have driven any distance on a deflated run-flat tire, check with an authorized run-flat tire service center, as soon as possible, to determine whether the tire can be repaired or should be replaced. To maintain your vehicle's run-flat feature, all replacement tires must be self-supporting tires. To locate the nearest GM or authorized run-flat servicing facility, call Roadside Service. See Roadside Service on page 531 for details. 430 {CAUTION: Run-flat tires are constructed differently than other tires and could explode during improper service. You or others could be injured or killed if you attempt to repair, replace, dismount, or mount a run-flat tire. Let only an authorized run-flat service center repair, replace, dismount, and mount run-flat tires. The valve stems on your vehicle's run-flat tires have sensors that are part of the Tire Pressure Monitor System (TPMS). These sensors contain batteries which are designed to last for 10 years under normal driving conditions. See your GM dealer, if the TPMS sensors or a wheel ever need replacement. Notice: Using liquid sealants can damage the tire valves and tire pressure monitor sensors in your vehicle's run-flat tires. This damage would not be covered by warranty. Do not use liquid sealants in your vehicle's run-flat tires.