It airs a contemporary hit radio format and is owned by iHeartMedia, Inc. Z107-7 carries two syndicated programs on weekdays, The Jubal Show from KBKS Seattle is heard in morning drive time while On Air with Ryan Seacrest is heard middays.

Its transmitter is off MacKenzie Road in the Shrewsbury neighborhood of St. Louis, amid the towers for area FM and TV stations.

The original call sign was KACO, and it was owned by the Apollo Broadcasting Company.

Two months later, the station returned to the air, changed its call letters to KGRV, and relaunched as "Music for Groovy Adults," offering a more upbeat AC format.

KMJM catered to both African-American and white audiences as the St. Louis market's first "CHUrban" station (a forerunner to the Rhythmic Contemporary format).

KMJM was ranked among the top five stations in the St. Louis Arbitron ratings during the 1980s, as it shifted towards a mainstream Urban Contemporary direction.

[6] In December 2017, KSLZ dropped Duran for local host Jordan DeSocio.