As far as we could tell this was at one time a final generation g-body Chevrolet El Camino. At first we were left melancholy by its picked over state, but then realized that its parts soldier on in what are likely many a 'minos still on the road. Either that or some hoon shoehorned the drivetrain into a Chevette, or similar.
Related:
All Caminos, All the Time [Internal]