WEYI-TV (channel 25), branded on-air as NBC 25, is a television station licensed to Saginaw, Michigan, United States, serving northeastern Michigan as an affiliate of NBC. It is owned by Howard Stirk Holdings, which maintains a shared services agreement (SSA) with Sinclair Broadcast Group, owner of Flint-licensed Fox affiliate WSMH (channel 66), for the provision of certain services. Sinclair also operates Bay City-licensed CW affiliate WBSF (channel 46) under a separate SSA with owner Cunningham Broadcasting. The three stations share studios on West Pierson Road in Mount Morris Township (with a Flint mailing address); WEYI-TV's transmitter is located at its former studios on West Willard Road in Vienna Township along the Genesee–Saginaw county line (with a Clio mailing address). History 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. On March 23, 1972, Lake Huron Broadcasting sold the station to Rust Craft Broadcasting, who changed the call letters to the current WEYI-TV. Soon afterward, the station moved to its current tower and (now former) studios on West Willard Road in Vienna Township. The new tower significantly improved channel 25's coverage in Flint while still being within of Saginaw as required by Federal Communications Commission (FCC) regulations. Prior to 1972, the southern side of the Flint/Saginaw/Bay City market, including Flint itself, got a better signal from Lansing's WJIM-TV (now WLNS-TV). Rust Craft merged with magazine publisher Ziff-Davis in 1979. The WKNX callsign is currently being used by an independent station in Knoxville, Tennessee. Ziff-Davis sold WEYI along with sister stations WRDW-TV in Augusta, Georgia, WROC-TV in Rochester, New York and WTOV-TV in Steubenville, Ohio to Television Station Partners in 1983. As a CBS affiliate, WEYI dropped the CBS soap Guiding Light in the fall of 1987, instead