Hey All. Need your help with a strange one. I have a '05 SE 6spd, and I get a loud rumbling sound coming from the dashboard area. The sound only occurs after the car has been driven for at least several miles, and then parked for about 15-20 minutes, and then restarted. (Usually happens when I run a quick errand, etc.) The noise goes away after about 5 or 10 minutes and it doesn't make any difference if I rev the motor, or start driving. Also, I can't seem to hear the noise from the engine compartment, so I'm pretty sure it's not the motor, but not sure what else could make sure a loud sound.

Sure do appreciate any help. Thanks!