The General Motors company is an automobile and parts manufacturer, founded in 1908 in Detroit, Michigan. By the early 1980s, GM produced the 6.5-liter “detroit” diesel motor, available to light- and heavy-duty trucks and sport utility vehicles.
GM developed the 6.5-liter, 397-cubic-inch engine in 1992. First versions of the motor showed increased performance over the previous 6.2-liter, advertising output at 190 hp and 380 foot-pounds of torque. Eventually, the motor saw an increase in power in select applications, and output performance was advertised at 215 hp and 440 foot-pounds of torque.
Built with cast-iron block and head material, the 397-cubic-inch motor was turbocharged.