See also:

Engine Heater
The engine coolant heater, if available, can help in cold weather conditions at or below −18°C (0°F) for easier starting and better fuel economy during engine warm-up. Plug in the coolant hea ...

Reactivation for Subsequent Owners
Push and follow the prompts to speak to an Advisor as soon as possible after acquiring the vehicle. The Advisor will update vehicle records and will explain the OnStar service offers and opt ...

Content Theft-Deterrent
Your vehicle may have the optional content theft-deterrent alarm system. To activate the theft-deterrent system: 1. Open the door. 2. Lock the door with the power door lock switch or the Remote ...