WCSG 91.3 MHz is a radio station in Grand Rapids, Michigan, United States, that broadcasts a Christian adult contemporary format. The station is a community outreach ministry of Cornerstone University. WCSG typically competes for the most-listened station in the Grand Rapids radio market, according to Nielsen data. WCSG is rebroadcast on three other stations throughout West Michigan: * 90.9 WCFG - Springfield/Battle Creek * 88.3 WCXK - Kalamazoo (Formerly WAYK) * 89.9 WCXB - Benton Harbor (Formerly WAYO)