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when i accelerate with my grand prix, i can hear a whistle coming from the engine, i checked all the seals and everything looks like its in order. but i can hear something in the alternator. and ideas on what it is?

Lots of possibility.

1. Alternator bearing failing.
2. Water pump bearing failing.
3. Leak in Intake Manifold.
4. Oil filter leaking (simple fix would be to tigten up the oil filter more to prevent oil from escaping through the oil filter gasket).
5. Some people notice they hear whistle after installing a CAI (cold air intake) and some reported somewhere in the PCV.
6. Stretched out serpentine belt or loose belt tensioner.

is it a whistle or like a whinning sound? mine has been makin a whinning sound like reeeeeeee then after like 2500 rpm or so u dont hear it. i think my dad said it was the power steering.

yea i thought it was the power steering too and i checked the power streering but the fluid was fine. i thought it was a bad bearing in the alternator but im to lazy to go to a mechanic.

Soviet, if the car is charging ok all the time.(Would need to get a voltimeter to make sure this is correct) and the whinning goes away when the engine rpms are higher than 2000 then even tought the PS is full it could make noise. That happens and gets worse with age

I had a whinning noise before and it was the air conditioning compressor. I bought some special oil for it (can't remeber exactly what its called), put it in and the engine was quiet after that.