My truck has the factory engine block heater already. Here in Alaska we can see -60°F temps in the winter. I installed an engine oil pan, a tranny oil pan, and battery heaters in addition to the engine block heater. In the past on 350 Chevy gas engines, I was able to add a second engine block heater in one of the freeze plug locations. Does the 6.0 PSD have a location that will accept a second engine block heater?