Frederick B Bend , OR January 13, 2020 Appliance: Whirlpool Undercounter Dishwasher GU1200XTKQ0 Whirlpool Dishwasher Gu1200xtkq0: Right front corner of the upper rack fell down. How to replace Upper Dishrack Wheel. Took out the bad part and put in the new ones. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes