WCRZ (107.9 FM, "Cars 108") is a radio station in Flint, Michigan, broadcasting an adult contemporary format. WCRZ is the top-rated heritage station in the market. History From its sign-on in 1961 until changing its call letters to WCRZ in 1984, the station was WGMZ with a beautiful music format. Those calls were assumed by an easy-listening station in Tuscola, Michigan three years later, and that station is known today as WWBN, and has been a sister station to WCRZ since the mid-1990s. Since t… (More on Wcrz)