1993 Cadillac DeVille Owner's Manual - Page 325

While the tires available as standardor optional equipment on General Motors vehicles may vary with respect to these grades,all suchtires meet General Motors performance standards and been approved for use have on General Motors vehicles. Allpassenger type (P Metric) tires must grades. conform to Federal safety requirements in addition to these Wheel Alignmentand Tire Balance The wheels on your vehicle were aligned balanced carefully at the and factory to give you the longest tire life and best overall performance. In most cases, you will not need tohave your wheels aligned again. However, if you notice unusual tire wear or your vehicle pulling way one or the other, the alignment may need to be reset. you notice your If vehicle vibrating when drivingon asmooth road, your wheelsmay need to be rebalanced. Meel Replacement Replace any wheel that is bent, cracked or badly rusted. If wheel nuts keep coming loose, the wheel, wheel bolts, wheel nuts should be and replaced. If the wheel leaks air out,replace it (except some aluminum wheels, whichcan sometimes be repaired).See your Cadillac dealer if any of these conditionsexist. Your dealer will know the kind of wheel you need. Each new wheel should have the same load carrying capacity,diameter, width, offset, and be mounted the same as the one it replaces. way If you need to replace of your wheels, wheel any bolts, or wheel nuts, replace themonly with newGM original equipment parts. This way, you will be sure to have the riqht wheel,wheel bolts, and wheel nuts foryour Cadillac model. 312