Cadillac, which is enjoying a sales renaissance, has put FleishmanHillard in the PR driver seat amid a shakeup of the General Motors luxury brand's advertising and marketing roster.

cadillacPublicis' Fallon was dropped after a three-year run as a three-agency team from Interpublic dubbed Rogue takes up creative AOR duties. Hill Holliday, Lowe and Campbell-Ewald make up the IPG trio.

Cadillac said Omnicom-owned FH will provide strategic communications counsel to the brand and help reach new customers in fashion, luxury and technology.

Bob Ferguson, a GM VP who heads marketing, brand management and advertising for Cadillac, is a former senior VP for FH.

FH president and CEO Dave Senay said in a statement that the agency's mandate is "driving the new Cadillac narrative and executing communications brilliantly in the places our buyers live."

FH already works with Cadillac parent General Motors.

GM said this month that Cadillac sales are up 38% in 2013, the biggest increase since 1976.