Edward M Lehighton , PA March 22, 2020 Appliance: Whirlpool Undercounter Dishwasher GU940SCGB2 Whirlpool Dishwasher Gu940scgb2: Upper spray arm assembly broke. How to replace Dishwasher Wash Arm Tube Holder. It took about 10 minutes. I took top basket out, took pics so I could see how it was. I marked on the basket where it was, took off the assembly and put the new one on. It's working great Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes