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 ...

Engine Coolant Heater
Vehicles with the engine coolant heater can use this option in cold weather conditions at or below −18°C (0°F) for easier starting and better fuel economy during engine warm-up. Plug i ...

Trailer Towing (Except CTS-V and Coupe)
Before pulling a trailer, there are three important considerations that have to do with weight: - The weight of the trailer. - The weight of the trailer tongue. - The total weight on the vehicl ...