1993 Chevrolet Suburban Owner's Manual - Page 320

Standard No. 109. Grades B and A representhigherlevels thelaboratory test wheelthantheminimumrequiredbylaw. of performanceon Warning:Thetemperaturegradeforthistire is established for a tire that is properlyinflatedandnotoverloaded.Excessivespeed,underinflation, or excessiveloading,eitherseparatelyor in combination,cancauseheatbuildup andpossibletirefailure. Thosegradesaremoldedonthesidewalls of passengercartires. WhilethetiresavailableasstandardoroptionalequipmentonGeneralMotors vehiclesmayvarywithrespect to thesegrades, all suchtiresmeetGeneral Motorsperformancestandardsandhavebeenapprovedforuse on General Motorsvehicles. All passengertype (P Metric)tiresmustconformtoFederal safetyrequirements in addition to thesegrades. Wheel Alignment and Tire Balance Thewheelsonyourvehiclewerealignedandbalancedcarefullyatthe factory to give you the longest tire life and best overall performance. to haveyourwheelsalignedagain. In most cases,youwillnotneed or yourvehiclepullingonewayor However, if younoticeunusualtirewear theother,thealignmentmayneed to bereset. If younoticeyourvehicle vibratingwhendrivingon a smoothroad,yourwheelsmayneed to be rebalanced. Wheel Replacement Replaceanywheelthatisbent,crackedorbadlyrusted. If wheelnutskeep If comingloose,thewheel,wheelbolts,andwheelnutsshouldbereplaced. thewheelleaksairout,replaceit(exceptsomealuminumwheels,whichcan be repaired). See your GM truckdealer if any of these conditions exist. Your dealerwillknowwhatkind of wheelyouneed. Eachnewwheelshouldhavethesameloadcarryingcapacity,diameter, width,offset,andbemountedthesame wayastheone it replaces. If youneedtoreplaceany of yourwheels,wheelbolts,orwheelnuts, replacethemonlywith new GM originalequipmentparts.This way,youwill for your besureyouhavetherightwheel,wheelbolts,andwheelnuts vehicle. 6-55