Extendable support device utilized with a cargo bed

A method of extending a cargo bed of a truck comprising the steps of:

• a. attaching an adjustable horizontal member to a trailer hitch extending from the truck, where the adjustable horizontal member includes a first plurality of apertures to accommodate a first pin that is utilized to secure said adjustable horizontal member at a length received by said trailer hitch;
• b. attaching an adjustable vertical member to said distal end of said adjustable horizontal member, where the adjustable vertical member includes a second plurality of apertures to accommodate a second pin, where the second pin secures said adjustable vertical member at a height;
• c. attaching an adjustable width member to the adjustable vertical member where the adjustable width member includes a horizontal base and a pair of vertical members perpendicularly attached at said ends of said horizontal base with a third plurality of apertures to accommodate a third pin and a fourth pin that is utilized to secure said adjustable vertical member at a width, where said adjustable width member is positioned parallel to the cargo bed of the truck;
• and
• d. disposing a pair of signal lights on said pair of vertical members of said adjustable width member.