As soon as possible, contact the nearest authorized GMor run-flat servicing facility for inspection and repair orreplacement. To locate the nearest GM or run-flatservicing facility, call Roadside Service. See RoadsideService on page 7-6 for details.{CAUTION:Run-flat tires are constructed differently thanother tires and could explode during improperservice. You or others could be injured orkilled if you attempt to repair, replace,dismount, or mount a run-flat tire. Let only anauthorized run-flat service center repair,replace, dismount, and mount run-flat tires.The valve stems on your run-flat tires have sensors thatare part of the Tire Pressure Monitor System (TPMS).These sensors contain batteries which are designed tolast for 10 years under normal driving conditions.See your dealer if you ever need to have a wheelreplaced, or if the sensors ever need replacement.Notice: Using liquid sealants can damage the tirevalves and tire pressure monitor sensors in yourvehicle’s run-flat tires. This damage would notbe covered by warranty. Do not use liquid sealantsin your vehicle’s run-flat tires.Inflation - Tire PressureTires need the correct amount of air pressure to operateeffectively.Notice: Do not let anyone tell you thatunder-inflation or over-inflation is all right. It is not.If your tires do not have enough air (under-inflation),you can get the following:• Too much flexing• Too much heat• Tire overloading• Premature or irregular wear• Poor handling• Reduced fuel economyIf your tires have too much air (over-inflation), youcan get the following:• Unusual wear• Poor handling• Rough ride• Needless damage from road hazards5-66
