I have a 02 Sedona and I think I'm getting the same noise. It happens when you are driving and it sounds kind of like one of those slide whistles. I think it only happens when the A/C is on so that leads me to believe it is a vent or something that automatically opens and closes. Or maybe it's a ghost.
i also have an 04 sedona, and i frequently get noise which seems to come from the a/c heater motor.
I had that problem also on my 2004 Sedona EX and had it repaired at dealer. They replaced the rear AC purge/evaporator. Thank god for the warranty! They told me the noise complaints are similar to a ghost, siren, or motorcyle accellerating noise.
it could be your valves or your engine
Bearing in blower motor?
Not enough info. What kind of noise? Coming from where? Under what situation(s) does it occur?
Most common culprit is a slipping belt.
it is under the carpet on the passenger side,
that could be a variety of things, wheel bearings, u joints, rear end...
under the center console way under it
under the bonnet
under the hod
Under the Hood.
Engine.
check the cadillidic converter under the car.