Dimensions for LTZ Hopefully this makes sense when used in reference to the pix above.
-Step size-28 inches by 7, 2 1/2 inches thick with a 1 !/4 inch wide strip underneath. The thickness will be
determined by the thickness of your checkerplate and the square stock, just keep a two inch space for the square
stock. (checkerplate = 28 by 12 by 3/16ths)
-main support 2 inch by 14 inch rounded corner square stock (to fit a hitch receiver so size as needed see below)
-side support 2 3/8 by 16 1/4" stock (the length is determined by the angle of your hitch support angle)
-support flange (the little wedge shaped piece welded on top of the side support that rests on the hitch support)
five inches long by two inches wide at the support end tapering down to 5/8" closest to the step
The step is centered on the truck, the door is centered a few inches to the right facing the door, this makes entry much better as the step in to the camper is direct from the center of the step into the left side (most open part) of the doorway opening and in line with the standing area in the camper.
If you started by measuring the center tube for the hitch receiver out to the back edge of the camper and then added 7 inches for a step you would be able to form the step. (I used checkerplate from an old box liner) The checkerplate needs to fit around the center tube, a 2" square cutout on the camperside edge provides a spot to tack.
Then put the tube in the hitch receiver, mark the hole for the pin, and measure how long your side supports need to be. Mine are 16" but every truck and hitch has different dimensions.
Cut and attach the side supports and cut and attach the top support wedge.
Even with just 7 inches hanging out the back we touch and drag when offroad so the step comes off and stores inside on the floor when the good roads disappear.