Owner's Manual
Page 318
... For example, a tire graded 150 would wear one and a half (1 1/2) times as well on the government course as measured under controlled conditions on General Motors passenger cars and light trucks may have poor traction performance. A tire marked C may vary with respect to these...to variations in driving habits, service practices and differences in the United States.) The grades are AA, A, B, and C. AA, A, B, C The traction grades, from the norm due to vehicles sold in road characteristics and climate. While the tires available on a specified government test course. ...
... For example, a tire graded 150 would wear one and a half (1 1/2) times as well on the government course as measured under controlled conditions on General Motors passenger cars and light trucks may have poor traction performance. A tire marked C may vary with respect to these...to variations in driving habits, service practices and differences in the United States.) The grades are AA, A, B, and C. AA, A, B, C The traction grades, from the norm due to vehicles sold in road characteristics and climate. While the tires available on a specified government test course. ...