TruTV has greenlit a third season of “Hardcore Pawn.”The reality skein has been a hit for the Turner cabler since launching in August. For season three, the net has ordered an additional 13 episodes that will begin airing in mid-February. Produced by Zodiak USA, the show centers on the American Jewelry and Loan pawn shop and the eccentric family — headed by owner Les Gold — and staff that runs it. Last Tuesday, the series began its second season with back-to-back episodes, drawing 2.1 million viewers with growth of 16% among adults 18-49. Natalka Znak, Claire O’Donohoe, Mike Gamson, Richard Dominick and Anthony Horn are exec producers.