Coolant Block Heater for M939A2 Series Military Trucks with Cummins 6CTA8.3 Diesel Engine. This does not fit the M939, M939A1 or M809 Series trucks with NHC-250 Cummins. See related items for this part.
This item fits the following series and models of equipment:
M939 Series (5-Ton)
M923A2 , M925A2 , M927A2 , M928A2 , M929A2 , M930A2 , M931A2 , M932A2 , M934A2 , M935A2 , M936A2