You did not mentioned the fan belt. That is the usual cause.
Bearing in blower motor?
It depends on the nature of the noise.
If the compressor is running, the blower is blowing, and there's no cold air, you need freon. If the whining is from under the hood, the compressor may be damaged. That's what happens when running without freon.
Hard to tell without hearing it. With engine running, open the hood and try to determine the area where the noise is coming from then repost info.
Whining noise near belts had pulleys adjusted any idea what is causing this
A whining noise in the transmission is usually an indication the transmission fluid is low. Check the transmission fluid and fill it to the recommended level.
It is the alternator....
Its could be the turbo your hearing...
it could be your valves or your engine
The kids in the back.
If the whistling noise is coming from under the hood its your belt, that's what's wrong with my Sequoia. If its not coming from under the hood its probably a crack in the seem of your window.