2004 Buick Park Avenue Owner's Manual - Page 308

(E) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (F) Uniform Tire Quality Grading (UTQG): Tire manufacturers are required to grade tires based on three performance factors: treadwear, traction and temperature resistance. For more information see Uniform Tire Quality Grading on page 5-75. (G) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load. For more information on recommended tire pressure see Inflation - Tire Pressure on page 5-69 and Loading Your Vehicle on page 4-33. Compact Spare Tire Example 5-64