My PowerClean would do that every once in a blue moon. The first rebuild was with mostly preexisting parts, and the squeak was more prominent, so I rebuilt it again and installed a new seal kit and impellers, and it was fine, just with a tiny chirp after the pump stopped, very very rarely.
If your KA's pump assembly is what I'm imagining, it's very similar to a Whirlpool PC setup so the impeller and motor seal should be the same. If you do ever decide to do a rebuild, you'll see why the squeak happens occasionally; there is a steel ring under the drain impeller that rests against the nylon(?) part of the seal that is directly surrounding the motor shaft. The impeller spins against that but because of the materials used, there isn't enough friction to speak of, especially with water present, and with proper dish soils being washed along with proper detergent and rinse aid. If you hold the seal and impeller together and turn it by hand, before installing, you'll see what we're talking about.
One word of warning: if you ever decide to rebuild, make super sure that you bolt down the drain and wash impellers and the filter module down to the shaft before pouring any water into the tub. I made the mistake of "testing" the seal that I had just installed, so I put a cup of water in, which promptly went straight to the floor. I realized that the impellers actually have to be mounted and bolted down in order to create the seal, so just putting that word of warning out there for you!
