“Breaker one-nine…you got the Road Hog here…how's it lookin' over your shoulder?” The twin CB-radio antennas on this Chevrolet® Bison™ are a sure sign that there's a “good buddy” behind the wheel of this magnificent beast. The Chevy® Bison was introduced in 1977, and the all-new big rig featured a lightweight aluminum cab, a fiberglass hood assembly, and a choice of diesel engines. Chevy exited the heavy-duty truck business in 1981, marking the end of the Bison's short, but memorable, production run.