whine

Engine fan. Sounds like a jet engine....well not really, but it's loud. Listen to semis when the take off at red lights when it's hot and you'll hear them as well. Fans do come on to some degree while underway on flatland if it's warm/hot w/ A/C on and towing.....just not as much unless the need for it calls to do so. If you pop the hood w/ eng running, you'll see the fan spinning around, but it's really not doing anything. Idea behind it not actually running full time is to save energy/fuel and HP. Today's turbos on pick-ups are very quiet IMO. Hear 'em more on semis.

Not touching the X-wife one, but that is funny.