Replaces Standard Railmount Hardware. Allows Toolbox to be installed flush against BackRack(TM). Eliminates gap between Toolbox and Backrack. Allows Toolbox to be installed without drilling into truck bed. Standard 21 inches. Optional 31 inches available.\nToolbox Bracket; 21 in.; Used To Mount Over-The-Rail Style Toolboxes; Fits PN[10503/10504/10505/10506/10507/10508/10509/10311/10517];\n1975-1986 Chevrolet C10, 1968-1974 Chevrolet C10 Pickup, 1988-1998 Chevrolet C1500, 1975-1986 Chevrolet C20, 1968-1974 Chevrolet C20 Pickup, 1988-1998 Chevrolet C2500, 1975-1986 Chevrolet C30, 1968-1974 Chevrolet C30 Pickup, 1988-1998 Chevrolet C3500, 1975-1986 Chevrolet K10, 1968-1974 Chevrolet K10 Pickup, 1988-1998 Chevrolet K1500, 1975-1986 Chevrolet K20, 1968-1974 Chevrolet K20 Pickup, 1988-1998 Chevrolet K2500, 1977-1986 Chevrolet K30, 1968-1974 Chevrolet K30 Pickup, 1988-2000 Chevrolet K3500, 1982-1987 Chevrolet S10, 1999-2020 Chevrolet Silverado 1500, 1999-2020 Chevrolet Silverado 1500, 2007 Chevrolet Silverado 1500 Classic, 2001-2003 Chevrolet Silverado 1500 HD, 2005-2006 Chevrolet Silverado 1500 HD, 2007 Chevrolet Silverado 1500 HD Classic, 2019 Chevrolet Silverado 1500 LD, 1999-2004 Chevrolet Silverado 2500, 2001-2020 Chevrolet Silverado 2500 HD, 2007 Chevrolet Silverado 2500 HD Classic, 2001-2006 Chevrolet Silverado 3500, 2007 Chevrolet Silverado 3500 Classic, 2007-2020 Chevrolet Silverado 3500 HD, 1993-2011 Ford Ranger, 1975-1978 GMC C15, 1968-1974 GMC C15/C1500 Pickup, 1979-1986 GMC C1500, 1988-1998 GMC C1500, 1975-1978 GMC C25, 1968-1974 GMC C25/C2500 Pickup, 1979-1986 GMC C2500, 1988-1998 GMC C2500, 1975-1978 GMC C35, 1979-1986 GMC C3500, 1988-1998 GMC C3500, 1975-1978 GMC K15, 1968-1974 GMC K15/K1500 Pickup, 1979-1986 GMC K1500, 1988-1998 GMC K1500, 1975-1978 GMC K25, 1968-1974 GMC K25/K2500 Pickup, 1979-1986 GMC K2500, 1988-1998 GMC K2500, 1977-1978 GMC K35, 1968-1974 GMC K35/K3500 Pickup, 1979-1986 GMC K3500, 1988-1998 GMC K3500, 1982-1987 GMC S15, 1999-2020 GMC Sierra 1500, 2007 GMC Sierra 1500 Classic, 2001-2003 GMC Sierra 1500 HD, 2005-2006 GMC Sierra 1500 HD, 2007 GMC Sierra 1500 HD Classic, 2019 GMC Sierra 1500 Limited, 1999-2004 GMC Sierra 2500, 2001-2020 GMC Sierra 2500 HD, 2007 GMC Sierra 2500 HD Classic, 2001-2006 GMC Sierra 3500, 2007 GMC Sierra 3500 Classic, 2007-2020 GMC Sierra 3500 HD ...See Application Guide for Additional Fitments
