Product review (4 stars): I was given a GE side-by-side with water and ice ...
I was given a GE side-by-side with water and ice dispenser.  The water worked, but the ice maker didn't.  The back of the fridge said that an "IM-6" ice maker would work, and after comparing my serial number to this, I picked this one.  My unit was rated a "K", and what I ordered started at "L".  However, the ice maker itself fit what I needed.  My ice maker now works.

This may be for people needing to set up an ice maker in a GE unit that doesn't have one, but I couldn't find something to replace a busted unit.  This worked for me.