BackRack low-profile tonneau hardware kit for 1999–2007 Silverado and Sierra trucks replaces standard railmount hardware to allow toolbox installation flush against the BackRack without drilling. The kit eliminates the gap between toolbox and rack and is supplied as a standard 21-inch option with other sizes available. It’s presented as a bolt-in low-profile solution intended to simplify accessory installation for these GM beds.
BackRack 99-07 Silverado Sierra Low Profile Tonneau Hardware Kit