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 ...

Interior
Five occupants get to enjoy soft all-leather seats. Offerings include heated and ventilated seating and a heated steering wheel. The STS features genuine eucalyptus wood and aluminum trim. Eight ...

Third Row Seats
On vehicles with third row seats, the seatbacks can be folded, and the entire seat can be tumbled or removed from the vehicle. For detailed instructions, see Third Row Seats  . ...