I got done with the power steering flush earlier today and even though all the old fluid got flushed out successfully and used Valvoline DEXRON III as the replacement, the damage was done and step 2 is to now replace the power steering pump itself. I went to check the truck again after sitting for an hour and the same whine is there but a little quieter.

I also checked the reservoir after the drive and found the fluid very bubbly even though I let it sit for some time. Would leaving the cap on make a difference? Thats what I did.

Also discovered the idler pulley shot and replaced it with a NAPA pulley hoping that was the source of whine but its not.