See also:

OnStar Overview
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services. The OnStar system ...

Customer Assistance Offices (Mexico)
To contact the Customer Assistance Center (CAC), use the phone numbers listed in this section. Customer assistance is available Monday through Friday, 08:00 to 20:00 hours, and Saturdays from 08:0 ...

Not quite midsize
Like most mid-size entry-level luxury cars, the CTS has a fairly restrictive cabin. Although I can live with that, the hard front and very tight rear seats put a damper on the experience. Sure, it ...