Jimmie M Slidell , LA February 22, 2020 Appliance: General Electric Dishwasher GSD4020Z02BB Ge Dishwasher Gsd4020z02bb: The wash tower was hanging up in the upper drawer. How to replace Dishwasher Spray Arm Assembly. Replaced wash tower and spray arm assembly. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes