 From August 2004 to June 2005 the station played an oldies format playing music from the 1950s and 1960s.On December 1, 2006, KKGO changed to a country music format, filling the void left behind when KZLA became rhythmic adult contemporary as KMVN earlier in 2006.On February 26, 2007, KKGO swapped call signs and formats with FM sister station KMZT, moving the country music format to 105.1 FM, and the classical format known as "K-Mozart" to 1260 AM and to a new HD channel at 105.1 HD2.