I researched the part for my Kenmore side-by-side refrigerator / freezer and found Part #:
AP3083600 (2174267) on website. After measuring the dimensions of an existing shelf and comparing with the on-line information, I was quite sure this was the one. After the simple process of ordering, my package arrived in only two days. It fit and took about a minute to install (including removing part of the tower of items in the freezer). Now I have an extra shelf so won't have to worry as much about dropping frozen items on my foot when I try to take something out of the freezer!