Zac S Raleigh , NC July 30, 2017 Appliance: Whirlpool Refrigerator GSF26C4EXW00 Whirlpool Refrigerator Gsf26c4exw00: Cluttered freezer. How to replace Glass Shelf. Added two shelves to the freezer. On my model, the upper shelf slots are a little bit longer than the lower shelf slots, so I had to order two distinct parts to fill the slots that remained after placing all of the factory shelves. Now fewer things are stacked so I can pull stuff out and put stuff in more easily (less door-open time and less worry about something falling out). 10 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes