See also:

Dual Automatic Climate Control System
The heating, cooling, and ventilation in the vehicle can be controlled with this system. A. Fan Control B. AUTO (Automatic Operation) C. Defrost D. Recirculation E. REAR (Rear Climate Control) ...

Engine Coolant Heater
The engine heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below −18°C (0°F). Vehicles with an engine heater should be plugged ...

Transferring Service
Push to request account transfer eligibility information. The Advisor can assist in canceling or removing account information. If OnStar receives information that vehicle ownership has changed, OnSta ...