All models of the M923 share a common basic chassis, cab, and hood/fenders. The basic truck is a 6×6 (three axles, six wheels, all of which are powered) medium truck.  The M923 and M939 models use a Cummins NHC 250, a 855 cu in (14.0 L) naturally aspirated inline 6 cylinder diesel engine developing 240 hp (180 kW) at 2100 rpm and 685 lbf·ft (929 N·m) of torque at 1,500 rpm.

North Augusta, South Carolina, United States