1995 GMC Safari Owner's Manual - Page 252

sudden tire failure. The grade C corresponds toa level of performance which all passenger car tires must meet under Federal Motor Vehicle the Safety Standard No. 109. Grades B and A represent higher levels of performance onthe laboratory test wheel than minimum required by the law. Warning: The temperature gradefor this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation,or excessive loading, either separately or in combination, can cause heat buildup and possibletire failure. These grades are molded on the sidewalls of passenger car tires. While the tires available as standard or optional equipment onGeneral Motors vehicles mayvary with respect to these grades,all such tires meet General Motors performance standards and have been approved use on for General Motors vehicles. All passenger type Metric) tires must conform (P to Federal safety requirementsin addition tothese grades. Wheel Alignment and Tire Balance The wheels on your vehicle were aligned and balanced carefullythe at factory to give you thelongest tire life and best overall performance. In most cases, you will not need have your wheels aligned again. to However, if you notice unusual wear or your vehicle pulling way or tire one the other, the alignment may need to reset. If you notice your be vehicle vibrating when drivingon a smooth road, your wheels may need to be rebalanced. Wheel Replacement Replace any wheelthat is bent, cracked, or badly rusted or corroded. If wheel nuts keepcoming loose, the wheel, wheel bolts, and wheel nuts should bereplaced. If the wheelleaks air, replace it (except some aluminum wheels, which can sometimes be repaired). See your GM dealer any of if these conditions exist. Your dealer will knowthe kind of wheel you need. Each new wheel should have the same load carrying capacity, diameter, width, offset, and be mounted the same way as the one it replaces.