02 HD whine?

My 02 GMC HD has a constant whine. What's the deal? Dealershiip tells me that it's normal. Sounds like crap to me.

Whines when accelerating, when idleing, all the damn time.
Really noticable just as I accelerate.

Any ideas?

I have a 2003 Sierra HD that whined bad. Took it back and they changed the power steering fluid to a thinner grade. Didn't work, took it back and they changed the power steering pump. That worked.