Owner's Manual
Page 328
...: A letter code is used to ‐width measurements. Tire Designations Tire Size The following is for temporary use only. (G) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to standards set by the U.S. Tire and Rim Association. GM's TPC specifications meet or... exceed all federal safety guidelines. The letter P as the first character in the tire size means a passenger vehicle tire engineered to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall. 10-54 Vehicle Care (F) Tire Size: A ...
...: A letter code is used to ‐width measurements. Tire Designations Tire Size The following is for temporary use only. (G) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to standards set by the U.S. Tire and Rim Association. GM's TPC specifications meet or... exceed all federal safety guidelines. The letter P as the first character in the tire size means a passenger vehicle tire engineered to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall. 10-54 Vehicle Care (F) Tire Size: A ...