James R Torrance , CA July 28, 2019 Appliance: General Electric Dishwasher GLDT690T00WW Ge Dishwasher Gldt690t00ww: Upper spray arm fell off. How to replace Upper Spray Asm. Super easy, just turn knob on replacement until it locks. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes