If GM plans on an SUT type of design for the H3, whether or not they call it H4, they need to make the bed usuable as a pickup. That is, if it is a Pickup bed design.

All the other manufacturer's trucks, with these short beds are useless.
They certainly can't haul very much, so what's the gain? You actually have more cargo carrying room with the wagon design.

The original concept H4, is more worthy of the design, since it gives the truck some measure of space in a longer bed, and a single cab.