The new campaign for Pontiac's 1999 Sunfire encourages prospects to "break a rule," like burning bridges or making waves. D'Arcy Masius Benton & Bowles, Troy, Mich., created two :30s aimed at young buyers with active lifestyles. The commercials are now running on national network and cable, and in 14 spot markets. Heavy national exposure is planned for October and November. The General Motors Corp. marque is spending an estimated $12 million during the period. Copywriter: Lou Schiavone. Art director: Linda Meek.