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Most of this is very familiar information, but worth reading for "new to run-flat drivers" or even re-reading. Some is painfully obvious. However a few nuggets thanks to GM TechLink:

"• Run-flat tires can be driven on with no air pressure. There is no need to stop on the side of the road to change the tire.

• There are speed and distance limitations when the tire is without air. To prevent permanent damage, keep vehicle speed below 50 mph (80 km/h). With a light load, the vehicle can be driven up to 60 miles (100 km); with a moderate load, 50 miles (80 km); and with a heavy load, 25 miles (45 km). As soon as possible, contact the nearest authorized GM or run-flat servicing facility for inspection and repair or replacement.

• When a tire has been damaged, or driven any distance while deflated, check with an authorized run-flat tire service center to determine whether the tire can be repaired or should be replaced.

TIP: To maintain the run-flat feature, all replacement tires must be run-flat tires.

• The valve stems on run-flat tires have sensors that are part of the Tire Pressure Monitor System (TPMS). These sensors contain batteries that are designed to last for 10 years under normal driving conditions."
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