See also:

Vehicle Speed Messages
SELECTED SPEED LIMIT EXCEEDED This message is displayed when the vehicle speed is greater than the set speed. See "Speed Warning" under Driver Information Center (DIC). ...

When to Check
Check the tires once a month or more. Do not forget the spare tire. See Full-Size Spare Tire   for additional information. ...

Reporting Safety Defects to the Canadian Government
If you live in Canada, and you believe that the vehicle has a safety defect, notify Transport Canada immediately, and notify General Motors of Canada Limited. Call Transport Canada at 1-800-333-05 ...