After having recorded all of Chicago's first five albums in New York City (except for parts of the second album recorded at CBS in Los Angeles), producer James William Guercio had his own Caribou Studios built in Nederland, Colorado during 1972. It was finished in time for the band to record their sixth album the following February. It would remain their recording base for the next four years.
Released in June 1973, Chicago VI was another commercial success, spending five weeks at #1 in the US. The band would not chart in the UK at all until 1976's Chicago X.
The album was mixed and released in both stereo and quadraphonic. The original U.S. CD release (Columbia CK #32400) was mastered for CD by Joe Gastwirt. In 2002, Chicago VI was remastered and reissued by Rhino Records, with two bonus tracks: a Terry Kath demo called "Beyond All Our Sorrows", and a recording of Al Green's "Tired of Being Alone", taken from the 1973 TV special, Chicago in the Rockies. In 2013, the audiophile reissue company Mobile Fidelity Sound Lab remastered Chicago VI and released it on Hybrid SACD which can be played on both CD players and SACD players.