The 6.5 L GM diesel was introduced in 1992, replacing the 6.2 L in 1993. Also manufactured by Detroit Diesel, the 6.5 was available in several versions to serve several different applications. The 6.5 L, like the 6.2 L, focused more on providing a fuel efficient diesel alternative. A special "Fuel Miser" version of the 6.5 surfaced in P-trucks (delivery trucks for bread/snack food companies) that produced the fuel mileage of a four cylinder. The 6.5 was offered in naturally aspirated & turbocharged versions.