Hi Jeff, I was hoping to see you here
Noise is louder inside, near the bottom. It's loud in the fridge inside, but much louder in the freezer drawer which is on the bottom. It sounds like it's coming from the top of the bottom third, if that makes sense. We don't use the ice maker, never hooked it up, but it almost sounds like it's coming from near the ice-tray. Of course it immediately slows to a stop when you open the door so you have to be quick about ID'ing the source of noise. It vaguely reminds me of a card in a bike wheel--which is why I imagine a wee mousey--ugh.
I've been to the LG site, and their trouble-shooting program ran me in disappointing circles. I shouldn't jump to criticize the LG site itself, it could very well be 'operator error'
I've combed my manual, no diagnostics, trouble-shooting or even a diagram for the guts.