Their final official release was a 10" vinyl on the now defunct label Man's Ruin Records, which was later re-released on a split CD with Homme's post-Kyuss project Queens of the Stone Age.

Upon leaving Slo Burn, Garcia formed the band Unida, which at one point included former Kyuss bassist Scott Reeder.

During their performance at Hellfest on June 20, John Garcia was joined on stage by former Kyuss members Brant Bjork and Nick Oliveri while playing "Gardenia" and "Green Machine".

[8] In 1999, Garcia collaborated with Swedish all-female stoner band Misdemeanor on "Love Song", the fourth track of their EP, Five Wheel Drive.

In 2001, he contributed vocals to the track The Thing That Should Not Be along with drummer Jason Bonham, bassist Jeff Pilson (Dokken,) and guitarist Kurdt Vanderhoof for the Metallica tribute album Metallic Assault.

In 2002, Garcia contributed vocals to two tracks on UK band Orange Goblin's album Coup de Grace, "Made of Rats" and "Jesus Beater".

The song did moderately well in terms of radio airplay and is highly popular among fans of The Crystal Method[citation needed], particularly because of the howling vocals Garcia laid down on the track.

On December 20, 2005, Garcia would finally team up with Homme again, making a guest appearance onstage with Queens of the Stone Age during the encore of their set at the Wiltern Theatre in Los Angeles.

[10] In 2008, John Garcia collaborated with Belgian band Arsenal on their album Lotuk, contributing lyrics and vocals to two tracks, "Not a Man" and "Diggin' a Hole".

The band members of Arsenal also shot a film documenting the making of the album, including footage of Garcia driving around in his hometown.

In 2012, Garcia appeared on the Mondo Generator album, Hell Comes to Your Heart, providing backing vocals on two of its tracks, "Won't Let Go" and "The Last Train".

Garcia has since toured under the moniker alongside the lineup of guitarist Ehren Groban, bassist Mike Pygmie, and drummer Greg Saenz.