A fuel tank module (10) for assembly into a vehicle is disclosed. The fuel tank module is provided with additional filling options to meet changing requirements at a work site. The fuel tank module has a first filler component (14). A first blank (16) or a second blank are alternatively and detachably positionable at a port provided on the fuel tank module. The second blank is provided with at least one through passage for a second filler component. The second filler component provides a fuel filling option that co-exists with the first filler component but used as an alternative to the first filler component.
