A vehicle assembly includes a cargo bed cover that covers a cargo bed of a vehicle when the cargo bed is in a standard bed position. The cargo bed cover is configured to provide an aft wall of the cargo bed when the cargo bed is in an extended bed position. A cargo bed providing method includes transitioning a cargo bed from a standard bed position to an extended bed position, and enclosing an aft end of the cargo bed with a cargo bed cover that covers the cargo bed when the cargo bed is in the standard bed position.