GM Authority has learned that General Motors will implement Apple Siri Eyes-Free functionality into their Chevy Sonic and Spark models within 12-months:

Today, GM Authority has learned that The General will soon introduce Siri eyes-free integration in its vehicles and the first ones to get the integration will be the Chevrolet Spark and Sonic. While the automaker’s media representatives didn’t provide specific timing details, we were told that we should expect an announcement within the next 12 months.

While Apple displayed the GM badge at their iOS 6 announcement during the WWDC 2012 keynote, little was know when GM would implement the technology, and into which models.