NewYork: Gannett Co Inc, one of the newspaper owners of Cars.com, is exploring a bid for all of the auto sales website and has discussed teaming up with private equity firms in a deal that could reach $3 billion, people familiar with the matter said. Gannett, the parent company of USA Today, is one of the five newspaper publishers that back Classified Ventures, the entity that owns Cars.com. Cars.com helps people buy and sell cars on the Internet.