See also:

Uniform Tire Quality Grading
Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: ...

Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, notify General Motors. Call 1-800-458-8006, or write: Cadillac Customer Assistance Center Cadillac Motor Car Divisio ...

Special Application Services
Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/ 3,000 mi. Have underbody flushing service performed once a year. ...