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The station began operation in September 2008, as a digital translator for KWVT-LP. In April 2009, KSLM signed an affiliation agreement with Retro TV. The KWVT programming remains available as a digital subchannel.
The change in channel was prompted by interference from another station operating on channel 16, KORS-CA. At the time KSLM began operation, KORS was licensed on channel 36. KORS was subsequently granted a construction permit to operate on channel 16 from a tower in Portland.