The founding members of Big Ass Truck included drummer Robert Barnett, Colin Butler, bassist Joe Boone, keyboardist Alex Greene, singer/guitarist Robby Grant and singer/guitarist Steve Selvidge. The line-up changed throughout the 90s, including bass players such as Lucero's/Jello 1-2-3's John C. Stubblefield, Grayson Grant and Dros Liposack, as well as keyboard player Chris Parker. At times, the band also included producer Ross Rice.