hey all. I am having this strange noise that can be heard while at idle sitting in the car. It sounds like a vaccum leak, or a pump running from in front of the dash. The noise also stays on for about four seconds after the engine is turned off. It can also be made by simply turning the key to the run position, then turning off. I was under the hood when my dad was turning the key, and it seems like the noise is coming from a component directly behind where the intake tube attaches to the manifold; directly behind the throttle body or whatever you want to call it. The component i suspect has two aluminum lines going into it. I don't have a maintenance manual yet, so that's the best description i can give. I'm not sure if this noise is normal or not, it just happened to be getting my ears attention lately. Maybe someone with a 2000 can try this with the radio off and stuff to see if you hear it is well. Like i said, it is quite apparent even with the truck at idle from inside. Any insight on what this may be and if it is normal or not? thanks.