Both technologies will find their way into 2017 model year vehicles, automating key aspects of driving for Cadillac owners.
Barra made the announcements on Sunday during her keynote address at the Intelligent Transport System (ITS) World Congress in Detroit.
"GM will put the first V2V-enabled car on the road in about two years, " Barra said. "What's more, I'm announcing that we will bring in advanced, highly automated driving technology to the market in this same timeframe."
The highly automated technology is the Super Cruise system that Cadillac began demonstrating and refining back in 2012. It plans to launch the system on an "all-new" 2017 Cadillac model.