He was born in Algeria, which he left in 1962, working on the Côte d'Azur as a DJ. He briefly sang in a surf pop group called Les Radis Beurre. [2] Lenoir began on France Inter as a music programmer on veteran presenter José Artur's Pop-Club show. He worked through the late 1970s presenting the rock programme Feedback, and continued on with it into the 1980s.
The show was cancelled after one season and Lenoir transferred to Europe 1. He also appeared on the television programme Les Enfants du rock.
In September 1990, Lenoir resumed broadcasting on France Inter in the evening shift. His programme, which ran until the 2010–2011 season, was first called L'Inrockuptible, after the magazine Les Inrockuptibles, and later renamed C'est Lenoir (This is Lenoir).
He is currently retired in Biarritz, France.