While Chevrolet is the car brand most closely associated with square-body trucks, GMC put its brand ... and the most recent 1973 GMC Sierra Grande sale recorded by Classic.com went for $31,000.

In a discussion of old-body style (OBS) Chevy pickup trucks, it's inevitable that the term "Square Body" will surface at some point. Chevrolet introduced the third generation of its C/K lineup of ...