Nissan Motor Co. has suspended development of its heavy-duty pickup and may scrap the program. It also will abandon some of its body-on-frame SUVs, replacing them with lighter, more fuel-efficient crossovers when those SUVs are scheduled to be replaced. The Infiniti QX56 and the Nissan Pathfinder and Armada use body-on-frame construction. "Not all but part of the SUVs are going to shift ...


