Uniform Tire Quality Grading
Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width.
For example:
See also:
Warranty
OnStar equipment may be warranted as part of the new-vehicle limited warranty.
The manufacturer of the vehicle furnishes detailed warranty information. ...
Tire Designations
Tire Size
The examples show a typical passenger vehicle and light truck tire size.
Passenger (P-Metric) Tire
(A) Passenger (P-Metric) Tire:
The United States version of a metric tire sizing syst ...
Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, please notify General Motors.
Call 1-800-GMC-8782 (1-800-462-8782), or write:
GMC Customer Assistance Center
P.O. Box ...