Abstract: An automobile accessory is configured to quickly convert a truck bed into an enclosed cargo compartment, passenger compartment, or camping compartment. The automobile accessory has a truck cabin joined to a truck bed and further comprising a truck cabin rear bulkhead. At least two pockets are arranged proximate a plurality of roller skids on the truck bed. A chassis is joined to a cargo, passenger, or camping compartment having a compartment forward bulkhead. A gasket is joined to the passenger compartment forward bulkhead. The chassis is detachably secured to the truck bed and further comprising at least two rollers. Rolling the at least two rollers into the at least two pockets and installing the gooseneck or fifth wheel adapter joins the chassis to a truck under-bed gooseneck/fifth wheel hitch and the passenger compartment forward bulkhead compresses the gasket creating a seal between the passenger compartment and the truck cabin.