The station began broadcasting on August 11, 1997, and held the call sign WTSG.[4] It aired a southern gospel format, and was owned by the Illinois Bible Institute.[4][5] WTSG was branded "Today's Solid Gospel" and was an affiliate of Salem Radio Network's Solid Gospel southern gospel network.[6] In 2012, Cornerstone Community Radio, Inc., owner of 1370 WLLM in Lincoln, Illinois, purchased the then-WTSG for $50,000, and began simulcasting the Christian programming of WLLM on the station.[7][8][9][10] On July 18, 2016, the station's call sign was changed to WLLM-FM.[11] In 2019, the station was sold to Good News Radio.[12][13] The sale, which included six sister stations and seven translators, was consummated on February 12, 2020 at a price of $1.1 million.
