In a 1977 interview with radio broadcaster historian Richard Dunning, KREM was described as the "first non-network, independent, all music station" in Spokane.

Under King Broadcasting ownership, KREM-AM-FM became a Top 40 station, vying with KJRB for Spokane's young radio listeners.

Popular KZZU DJs at the time included Jamie Patrick, Lyn Daniels, Casey Christopher, Sean Rivers, Kevin James, Steve Hawk, Paul Gray, Rachel Brooks, Doug Inman and Jeffrey Parker.

In the early 2000s, changing tastes towards rock music and increased competition caused KZZU to move more towards a rock-leaning Top 40 as hip hop fell to the lower end of its playlist.

In its last year as "93 Zoo FM", the station was noted in having an all-female DJ line up with the exception of Rick Dees and Hollywood Hamilton on Sundays.

On October 17, 2005, KZZU dropped the "Zoo FM" moniker in favor of "92.9 ZZU", and shifted to adult top 40 in order to more effectively compete with KCDA.

Dave, Ken, Molly and producer Dan Roberts host the station's morning show, targeting an 18 to 49 year old demographic.