Its studios are located at the Illinois Center complex in the Chicago Loop, while the station transmitter is on top of the Willis Tower.

This station signed on the air as WEBH-FM on April 7, 1958;[2][3] the call letters stood for the Edgewater Beach Hotel, the location of its original studios and transmitter site.

WLAK adopted the beautiful music format produced and distributed by Stereo Radio Productions, as did the other Sudbrink FM stations.

[15] While the company's other radio stations were sold in 1979, Federal Communications Commission (FCC) regulations of the time required Storer to retain WLAK for three years.

[16][17] Core artists included Neil Diamond, Barbra Streisand, Lionel Richie, and softer selections by the Beatles.

WLIT became Chicago's only adult contemporary station on August 1, 2011, when former rival 105.9 WCFS-FM flipped to a simulcast of all-news radio 780 WBBM.

[32] In December 2018, Robert Feder reported that WLIT planned to flip to a soft adult contemporary format.

[34][35] On February 1, 2016, WLIT's HD2 adopted a Regional Mexican format branded "Poder 97.5" (Power 97.5), which was rebroadcast at 97.5 MHz through FM translator W248BB.

[41] Its Christmas mix, featuring approximately 250 songs, weighs heavily toward standards, especially in early November, so as to give listeners a greater emphasis on the familiar.

[44] Delilah's program was taken off WLIT again in March 2012, but was brought back in December 2017, after the station returned to its "Lite FM" branding.

WLIT also carries the Ellen K Weekend Show from co-owned KOST Los Angeles on Saturday mornings.

[46][47][48] WLIT's midday DJ is Robin Rock, Mick Lee is heard in afternoon drive time and Theresa Lucas overnight.