OnStar Corporation is a subsidiary of General Motors that provides subscription-based communications

Telecommunication

Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...

, in-vehicle security, hands free calling, turn-by-turn navigation, and remote diagnostics

Remote diagnostics

Remote diagnostics is the act of diagnosing a given symptom, issue or problem from a distance. Instead of the subject being colocated with the person or system doing the diagnostics, with remote diagnostics the subjects can be separated by physical distance...

 systems throughout the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 and China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

. A similar service is known as ChevyStar in Latin American markets. The service currently has more than six million customers.
A new retail rear-view mirror with a built-in OnStar module, branded as OnStar FMV, became available to the public on July 24, 2011.