1993 GMC Suburban Owner's Manual - Page 318

Tire?inspection and To makeyourtireslastlonger,havetheminspectedandrotatedatthe mileagesrecommended in theMaintenanceSchedule.See"Scheduled MaintenanceServices" in theIndex. FRT FRT K2655 Usethisrotationpattern. If your vehicle has front tires with different load ratings or tread designs '(such as all season vs. on/offroad)thanthereartires,don'trotateyourtiresfront torear. Afterthetireshavebeenrotated,adjustthefrontandrearinflationpressure asshownonthe Certificationnirelabel.Makecertainthatallwheelnutsare properlytightened.See"WheelNutTorque" in theIndex. A Rust or dirt on a wheel, or on the parts to which it isfastened,can makethewheelnutsbecomelooseafter a time. The wheelcould come off andcauseanaccident.Whenyouchangeawheel,remove anyrust or dirt fromplaceswherethewheelattachestothevehicle. In anemergency,youcanuse acloth or papertoweltodothis;but be sure to use a scraperorwirebrushlater, if youneedto, to get alltherust or dirt off. (See"ChangingaFlat Tire" in theIndex.) 6-52