T Joe R Dublin , CA July 09, 2017 Appliance: General Electric Dishwasher ZBD6880N20SS Ge Dishwasher Zbd6880n20ss: Worn rusting upper and lower racks in dishwasher. How to replace Upper Dishrack Assembly. Ordered new racks. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes