107.3 FM signed on the air in 1962 as KSTN-FM, carrying a full-time classical music format. The following year, they added some Regional Mexican Music and by 1965, They dropped classical music entirely and expanded the Spanish programming with some simulcast of the Top 40 music of its AM sister Station at 1420. KSTN-FM was mono sound from its inception in 1962 until 1996 when they went stereo sound.
On February 22, 2010, KSTN-FM dropped its Regional Mexican format in favor of an English-language Contemporary Christian music format, via satellite from K-LOVE. The station would later change its calls to KLVS in March 2010.