Darrell D Morton , TX February 11, 2024 Appliance: Whirlpool Undercounter Dishwasher GU940SCGQ2 Whirlpool Dishwasher Gu940scgq2: The upper dishrack broke where the roller attaches.. How to replace Dishwasher Upper Rack Roller. Replaced the upper dishrack assembly and its rollers. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes