Every DU-HA is custom-designed to fit a particular model of truck. The DU-HA for the 19 Chevrolet/GMC Silverado/Sierra Light Duty Crew Cab trucks is designed to fit underneath your pre-existing back seat. It's constructed from heavy-duty polyethylene and includes a lifetime . This model acts as a legal gun case in most states and will hold up to 3 shotguns or rifles, 1 with scope. Then set the DU-HA underneath the back seats and replace the jack units. The DU-HA will hold larger items without the organizers / gun rack installed.