1993 GMC Suburban Owner's Manual - Page 315

Poorlymaintainedandimproperlyusedtiresaredangerous. Overloadingyourtirescancauseoverheatingasaresult of too muchfriction. You couldhaveanair-outandaseriousaccident. See"LoadingYourVehicle" in theIndex. 8 Underinflatedtiresposethesamedangerasoverloadedtires. Theresultingaccidentcouldcauseseriousinjury.Checkalltires frequently to maintaintherecommendedpressure.Tirepressure shouldbecheckedwhenyourtiresarecold. Overinflatedtiresaremorelikelytobecut,punctured, or broken bysuddenimpact,suchaswhenyouhitapothole.Keeptires attherecommendedpressure. Worn, oldtirescancauseaccidents. If yourtreadisbadlyworn, or if yourtireshavebeendamaged,replacethem. e Even if it'slegal,don'tdriveover 85 mph (135 km/h) if you have 16 inchtires. See"SpecialTireInflation" in thissectionformoreinformationon loadingandinflationpressuresatspeedsabove 65 mph (105 kmlh). 0 hfatkm-Tire Pressure The Certificationnire labelwhich is ontherearedgeofthedriver's door, or ontheincompletevehicledocument in thecab,showsthecorrectinflation "Cold'' meansyourvehiclehas pressures for your tires, when they're cold. beensittingforatleastthreehours or drivennomorethanamile. You canoperatesomevehiclesatreducedinflationpressuresonlywhen you'll be carryingreducedloads.Onthosevehicles,theminimum cold inflation pressuresforatypicalreducedloadareprintedonthe"ImprovedRideTire to findthe Pressure"labellocatedonthedriver'sdoor.Weighthevehicle loadoneachtireandseethelabelfortheminimumcoldinflationpressures for that load. 6-49