Stressing utility, economy and mobility, under its cab is a Corvair engine sending power to a PowerGlide transmission and on to all four wheels via a driveshaft that can be decoupled. The ability to split things up means that the nine-foot cargo bed can be swapped out for another load unit or implement, the two-wheeled cab moving from one to the other with the help of a pair of fore and aft training wheels. Speaking of wheels, the front set don't turn on a steering rack, they are locked in position with the cab and rotate independently to change direction.
The 15-foot pickup on 44-inch tires was a serious piece of kit, rated for a 1.25-ton payload, rocking 20 degrees of roll angle between cab and bed and able to sashay up a 60-percent grade. It lived and died as a concept, though, GM opting against production. We'd like to know where it is or what happened to it, so if you know, give us a clue in Comments. You can watch it jiggle and strut in the video below.