On August 30, 2007, the Houston Chronicle reported that KIOL would be switching to the Jack FM format at 10:37 a.m. the following day, and adopting new call letters, KHJK Jack FM to make Houston debut.
The Houston Chronicle revealed on August 30, 2007, that KIOL was set to switch to the popular Jack FM brand at 10:37 a.m. the next morning, adopting new call signs, KHJK Jack FM, and making its presence known in Houston.