2005 Cadillac CTS Owner's Manual - Page 341

Run-Flat Tires (CTS-V) If your vehicle has run-flat tires, there is no spare tire and no tire changing equipment. Your vehicle also has a Tire Pressure Monitor (TPM) which will alert you if there is a loss of tire pressure in any of the tires. See Tire Pressure Monitor System (CTS-V) on page 5-65. {CAUTION: When the low tire warning light is displayed on the instrument panel cluster, your vehicle's handling capabilities will be reduced during severe maneuvers. If you drive too fast, you could lose control of your vehicle. You or others could be injured. Don't drive over 55 mph (90 km/h) when the low tire warning light is displayed. Drive cautiously and check your tire pressures as soon as you can. If a tire goes flat, you won't need to stop on the side of the road to change the tire. You can just keep on driving. The tire can operate effectively with no air pressure for up to 65 miles (105 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 won't 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've driven on the tire in a deflated condition. When a tire has been damaged, or if you've driven any distance on a run-flat tire, check with an authorized run-flat tire service center 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. As soon as possible, contact the nearest authorized GM or run-flat servicing facility for inspection and repair or replacement. 5-61