03 Silverado transmission whining.
 

I have had this whining noise for about 2 years. Took it to several dealers in town and still get the same answer. Yes there is a noise, it's normal! Yes there is a noise, but if we don't find any problem, warranty would not cover it, $2500.00 dollars out my pocket!
Has anyone had this issue addressed in this forum?
I have an 03 Chevy LS 2500HD, Crewcab/Longbed 6.0ltr. 4x4
The transmission whine is getting annoying and maybe even louder!
Please advice!
Thanks,