I have a 2002 Dodge Ram with a 5.9 liter V8, and it has a electrical plug behind the grill right on the passenger side of the Radiator so u can plug it in. I'm not sure what its for cause i never heard of a plug being on a gasoline engine like they have on diesels. Is that for a block heater or what? I tried to follow the wires and it looks like they go back to the rear of the engine somewhere. Im scared of plugging it in cause i don't want the thing catching on fire or something.