Tonneau cover extension

1 . A tonneau cover assembly comprising:

a cover that includes at least one panel section;

wherein the at least one panel section selectively shrouds at least a portion of an opening of a cargo box;

wherein the at least one panel section is movable with respect to the opening;

wherein the at least one panel has an end locatable adjacent an exterior of the cargo box;

an extension panel coupled to the end of the at least one panel section;

wherein the extension panel is movable between a use position and a stowed position;

wherein when in the use position at least a portion of the extension panel extends from the at least one panel section and the exterior of the cargo box;

wherein when in the stowed position the extension panel is located within the cargo box;

wherein when in the use position an end of the extension panel is located adjacent an end of the at least one panel section;

wherein when in the stowed position the extension panel is located underneath the at least one panel section with the at least one panel located adjacent the exterior of the cargo box and the at least one panel shrouds the at least the portion of the opening of the cargo box; and

at least one support located underneath the extension panel when in the use position and the exterior of the cargo box.

2 . The tonneau cover assembly of claim 1 , further comprising a hinge coupled to the extension panel and to the at least one panel section.

3 . The tonneau cover assembly of claim 1 , wherein the extension panel is movable with respect to the at least one panel section between the stowed position and the use position.

4 . The tonneau cover assembly of claim 1 , further comprising a receiver that holds at least a portion of the at least one support when the extension panel is located in the use position.

5 . The tonneau cover assembly of claim 4 , wherein the receiver is attached to the cover.

6 . The tonneau cover assembly of claim 4 , wherein the receiver is configured to attach to a rail that is attached to the cargo box.

7 . The tonneau cover assembly of claim 4 , wherein the at least one support includes a post that is extendable into the receiver when the extension panel is located in the use position.

8 . The tonneau cover assembly of claim 1 , further comprising a second support located underneath the extension panel when in the use position, exterior of the cargo box, and spaced apart from the at least one support.

9 . The tonneau cover assembly of claim 1 , wherein the at least one support is removable from the tonneau cover assembly.

10 . The tonneau cover assembly of claim 2 , further comprising a release assembly that extends from underneath the at least one panel section adjacent the hinge, wherein the hinge does not interfere with operation of the release assembly.

11 . The tonneau cover assembly of claim 1 , wherein the at least one panel section is a tailgate panel.

12 . The tonneau cover assembly of claim 4 , wherein at least a part of the at least one support is extendable from the receiver when the at least one panel section is in the use position and retractable toward the receiver when the at least one panel section is in the stowed position.

13 . The tonneau cover assembly of claim 12 , wherein the receiver is coupled to the cover.

14 . A tonneau cover assembly comprising:

a cover that includes at least one panel section;

wherein the at least one panel section is a tailgate panel;

wherein the tailgate panel selectively shrouds at least a portion of an opening of a cargo box;

wherein the tailgate panel is movable with respect to the opening; and

an extension panel coupled to the tailgate panel;

wherein the extension panel is movable between a use position and a stowed position;

wherein when in the use position at least a portion of the extension panel extends from the tailgate panel and exterior of the cargo box.

15 . The tonneau cover assembly of claim 14 , wherein when in the stowed position the extension panel is located within the cargo box.

16 . The tonneau cover assembly of claim 14 , wherein when in the use position an end of the extension panel is located adjacent an end of the tailgate panel.

17 . The tonneau cover assembly of claim 14 , wherein when in the stowed position the extension panel is located underneath the tailgate panel.

18 . The tonneau cover assembly of claim 14 , wherein at least one support is located underneath the extension panel when in the use position and exterior of the cargo box.

19 . A tonneau cover assembly comprising:

at least one panel section selectively shrouds at least a portion of an opening of a cargo box;

wherein the at least one panel section is movable with respect to the opening; and

an extension panel coupled to the at least one panel section and is movable between a use position and a stowed position;

wherein when in the use position at least a portion of the extension panel extends from the at least one panel section and exterior of the cargo box;

wherein the extension panel is attachable to the at least one panel section when in the use position and separable from the at least one panel section when in the stowed position;

wherein the extension panel includes an insert extending therefrom configured to be received in an insert slot disposed in a rear periphery of the at least one panel section.