WKSC-FM (103.5 MHz) – branded "103.5 Kiss FM" – is a commercial contemporary hit radio station licensed to Chicago, Illinois.

[6][7] The music had appropriate moods through the day, with morning and afternoon drive times more upbeat, and it was considered to have a "highbrow" sound.

[6] Programs included Morning Serenade, Musical Bon-Bons, Pleasant Listening, Rendezvous With Rhythm, Dinner Musicale, and Stereo Showcase.

[2] In 1976, WFYR began carrying Dick Biondi's syndicated program Super Gold Rock n' Roll.

[3] "The Blaze" featured acts such as AC/DC, Cinderella, Def Leppard, Great White, Guns N' Roses, Kiss, Led Zeppelin, Mötley Crüe, Slaughter, and Warrant.

[31][34] The station's initial on-air personalities included Steven Craig in mornings, Steve Seaver in middays, Brian Kelly in afternoons, and Kevin Lewis evenings.

[31] Other personalities on The Blaze included Leslie Harris, Scott Childers, and helicopter reporter "Major Tom".

[35][36][37] WWBZ presented "Blazefest", a rock music memorabilia show and concert at the Odeum Expo Center in Villa Park, which featured performances by bands such as Kiss, I Mother Earth, Saigon Kick, Screamin' Cheetah Wheelies, and Warrant.

[45] Other airstaff on Rock 103-5 included Terry Gibson,[46] Eddie Webb,[47] Ned Spindle,[48] Sludge,[48] Cara Carriveau,[49] and Chris Payne.

[47] WRCX hosted "Rockstock", which featured performances from Megadeth, Local H, Veruca Salt, Silverchair, Faith No More, Helmet, and Joan Jett & the Blackhearts.

[3] At the time of the flip, Big City Radio's WKIE, WKIF, and WDEK had collectively been known as "92 Kiss FM" (also with a CHR format) since 1998.

[71] Java Joel was the evening host of The Rubber Room on the station from 2001 until January 2005 when he was fired for comments that were deemed racist.

[82] In October 2016, Erik Zachary was named as the new full-time evening personality[83] and served in that position until August 2019 when he exited to pursue other opportunities.

[84] From June 2006 to early 2013, WKSC-FM HD2 aired programming from "Pride Radio", a Top 40/Dance format targeting the LGBTQ community.

In November 2013, WKSC-FM HD2 changed to a smooth jazz format along with airport information as "Air Chicago Radio".

[86][87] In late 2018, WKSC's HD2 subchannel began broadcasting soft adult contemporary music as "The Breeze".