Fuel Pump??

[Denalievv]

I have a 2010 Yukon XL Denali with a high pitched whine coming from under the truck whether it's on, or if the key is in the on position but not running.

I wanted to pull the fuel pump fuse, but there isn't on in the listed position on the underwood schematic. Am I missing something?

 

[Denalievv]

Update... The sound is coming from inside the transmission! Is this normal? The dealership dropped the pan and changed the fluid 2 weeks ago, I never noticed it before that.

You can hear it when the ignition is in the ACC position. Really high pitched whine.

Oh, and I'm still wondering where the fuel pump fuse and relay are??

 

[Denalievv]

Has anyone experienced this before?