General Motors is putting TV’s biggest spotlight on Chevrolet and Cadillac with its Super Bowl ad buy on Feb. 5. But the mileage it gets from the game-day juggernaut comprising ads before the game, four ads in the game, and two after may well come from how the ads are integrated with the automaker’s digital and social-media programs prior to, on, and after Super Bowl Sunday. Joel Ewanick, global head of marketing for the automaker, tells Marketing Daily that a major play for Chevrolet on Feb. 5 is to spark Millennials’ interest through ads for the Chevy Sonic car. One of Chevrolet’s three spots in the game is focused on the car. That and a second in-game spot are the capstones on digital efforts over the past weeks and months. The second ad is the winner of a global crowd-sourcing creative competition, “Chevrolet Route 66” (ChevroletRoute66.MSN.com.) The third spot is all about Chevy trucks.