296 VEHICLE CAREalignment and tire balancing are notnecessary on a regular basis. Consideran alignment check if there is unusualtire wear or the vehicle is significantlypulling to one side or the other. Someslight pull to the left or right,depending on the crown of the roadand/or other road surface variationssuch as troughs or ruts, is normal.If the vehicle is vibrating when drivingon a smooth road, the tires andwheels may need to be rebalanced.See your dealer for proper diagnosis.Wheel ReplacementReplace any wheel that is bent,cracked, or badly rusted or corroded.If wheel nuts keep coming loose, thewheel, wheel bolts, and wheel nutsshould be replaced. If the wheel leaksair, replace it. Some aluminum wheelscan be repaired. See your dealer if anyof these conditions exist.Your dealer will know the kind ofwheel that is needed.Each new wheel should have the sameload-carrying capacity, diameter,width, offset, and be mounted thesame way as the one it replaces.Replace wheels, wheel bolts, wheelnuts, or Tire Pressure Monitor System(TPMS) sensors with new GM originalequipment parts.{ WarningUsing the wrong replacementwheels, wheel bolts, or wheel nutscan be dangerous. It could affectthe braking and handling of thevehicle. Tires can lose air, andcause loss of control, causing acrash. Always use the correct wheel,wheel bolts, and wheel nuts forreplacement.CautionThe wrong wheel can also causeproblems with bearing life, brakecooling, speedometer or odometer(Continued)Caution (Continued)calibration, headlamp aim, bumperheight, vehicle ground clearance,and tire or tire chain clearance tothe body and chassis.Used Replacement Wheels{ WarningReplacing a wheel with a used oneis dangerous. How it has been usedor how far it has been driven maybe unknown. It could fail suddenlyand cause a crash. When replacingwheels, use a new GM originalequipment wheel.Tire Chains{ WarningIf the vehicle has P245/40R18, 245/40R18, 275/35R18, 255/35R19, 265/35ZR19, or 295/30ZR19 size tires,(Continued)
