1997 Cadillac DeVille Owner's Manual - Page 329

Temperature -- A, B, C Wheel Alignment and Tire Balance The wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest tire life and best overall performance. Scheduled wheel alignment and wheel balancing are not needed. However, you notice unusual tire wear if or your vehicle pulling way or the other, the alignment one may need to reset. If you notice your vehicle be vibrating when driving on a smooth road, your wheels may need to rebalanced. be The temperature grades are (the highest),B and C, A representing the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on specified indoor laboratory a test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature lead to sudden tire can failure. The grade C corresponds to a level of performance whichall passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades A and B represent higher levels of performance on the laboratory test wheel than the minimum required by law. Warning: The temperature grade for 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 possible tire failure. Wheel Replacement Replace any wheel that bent, cracked or badly rusted is or corroded. If wheel nuts keep coming loose, the wheel, wheel bolts and wheel nuts shouldreplaced. If the be wheel leaks air, replace (except some aluminum it wheels, whichcan sometimes be repaired). See your Cadillac dealer if any these conditions exist. of Your dealer will know the kind of wheel you need. Each new wheel should have same load-carrying the capacity, diameter, width, offset and be mounted the same way as the it replaces. one 6-46