DETROIT: General Motors has overhauled the marketing and sales units of its eight vehicle marques and recruited a senior Nissan US executive to oversee its three premium brands.

Mark McNabb will lead sales and marketing of the Cadillac, Hummer and Saab divisions, one of four brand channels. He and his three colleagues will report directly to GM's North American sales chief, Mark LaNeve.

Ed Peper will become North America vp for the Chevrolet retail channel, Susan Docherty leads the Buick-Pontiac-GMC channel and Jill Lajdziak will remain Saturn general manager and will also oversee sales.

The company believes the realignment will simplify its structure and improve focus. The automaker has in the past been criticized for the number and range of marques in its stable.

Declares GM North America president Troy Clarke: "These changes have been designed to improve all of our brands, and achieve strongly profitable channels at both a wholesale and retail level.

"We are further streamlining the organization to ... align resources to improve the consumer experience and improve bottom line business results."

Data sourced from Wall Street Journal Online; additional content by WARC staff