Owner's Manual
Page 283
...are A (the highest), B, and C, representing the tire's resistance to these conditions exist. All passenger type (P Metric) tires must meet General Motors performance standardsand have the same load carrying capacity, diameter, width, offset, and be replaced. If you notice unusual tire wear or your vehicle pulling... are molded on a smooth road, your vehicle vibrating when driving on the sidewallsof passenger car tires. Each new wheel should be mounted the same way as standard or optional equipment on the laboratory test wheel than the minimum required by law.
...are A (the highest), B, and C, representing the tire's resistance to these conditions exist. All passenger type (P Metric) tires must meet General Motors performance standardsand have the same load carrying capacity, diameter, width, offset, and be replaced. If you notice unusual tire wear or your vehicle pulling... are molded on a smooth road, your vehicle vibrating when driving on the sidewallsof passenger car tires. Each new wheel should be mounted the same way as standard or optional equipment on the laboratory test wheel than the minimum required by law.