[RayChez1]

It seems like it would have a block heater. I have the Cat engine also. The switch to the block heater on mine is on the side of the box for the bed. It has a amber light that goes on when you turn it on. The chord plug in is in the invertor compartment on the top. Mine out of the factory was not plugged in. The chord was wrapped up with a tie wrap.

I have read that some coaches do not have the switch to turn it on, but instead is turned on by a circuit breaker. And that would also be in the side of the bed where your AC circuit breakers are located.