Black plate (57,1)Cadillac CTS Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-6081492) - 2014 - CRC 2nd Edition - 11/18/13Vehicle Care 10-57When It Is Time for NewTiresFactors such as maintenance,temperatures, driving speeds,vehicle loading, and road conditionsaffect the wear rate of the tires.Treadwear indicators are one way totell when it is time for new tires.Treadwear indicators appear whenthe tires have only 1.6 mm (1/16 in)or less of tread remaining. See TireInspection on page 10-55 and TireRotation on page 10-55.The rubber in tires ages over time.This also applies to the spare tire,if the vehicle has one, even if it isnever used. Multiple factorsincluding temperatures, loadingconditions, and inflation pressuremaintenance affect how fast agingtakes place. GM recommends thattires, including the spare ifequipped, be replaced after sixyears, regardless of tread wear. Thetire manufacture date is the last fourdigits of the DOT Tire IdentificationNumber (TIN) which is molded intoone side of the tire sidewall. Thefirst two digits represent the week(01–52) and the last two digits, theyear. For example, the third week ofthe year 2010 would have afour-digit DOT date of 0310.Vehicle StorageTires age when stored normallymounted on a parked vehicle. Parka vehicle that will be stored for atleast a month in a cool, dry, cleanarea away from direct sunlight toslow aging. This area should be freeof grease, gasoline, or othersubstances that can deterioraterubber.Parking for an extended period cancause flat spots on the tires thatmay result in vibrations whiledriving. When storing a vehicle forat least a month, remove the tires orraise the vehicle to reduce theweight from the tires.Buying New TiresGM has developed and matchedspecific tires for the vehicle. Theoriginal equipment tires installedwere designed to meet GeneralMotors Tire Performance CriteriaSpecification (TPC Spec)system rating. Whenreplacement tires are needed,GM strongly recommendsbuying tires with the same TPCSpec rating.GM's exclusive TPC Specsystem considers over a dozencritical specifications that impact
