Channel 25 is one of the nation's oldest UHF stations. It debuted on April 5, 1953 as WKNX-TV on channel 57. It was owned by Lake Huron Broadcasting along with WKNX radio (AM 1210, now WJMK at AM 1250), and was a CBS affiliate. It also shared ABC with DuMont affiliate WTAC-TV and then-NBC affiliate WNEM-TV (which later became sister to the former WKNX radio). The station first operated from studios located on South Washington Avenue in Downtown Saginaw. When WTAC-TV shut down in 1954, WKNX-TV and WNEM-TV shared ABC until WJRT-TV signed on in 1958. It moved to the stronger channel 25 on September 14, 1965. The station later relocated its studios to a new facility located on State Street in Saginaw.