A Pontiac Grand Am plies a landscape forged of steel in a spot that unveils a new tagline--"Are you a hard-core driver?"--for the General Motors Corp. car. D'Arcy Masius Benton & Bowles, Troy, Mich., created the spot and re-edited all prior commercials with the new tag, aimed at improving positioning of the Grand Am's stronger frame in tough driving conditions. Copywriter: Russell Rinke. Art director: Keith Loell.