Replacing KitchenAid Dishwasher Pump

I have a KitchenAid dishwasher model KUDS01DLSS2. It has a very load whining sound. I checked the grinder and it is clear. I assume the sound is coming from the pump as the motor sounds like it is working OK.

I would like to replace the pump (unless you have different advice). Looking at Appliancepartspros KUDS01DLSS2 "Pump and Motor Parts Assembly" diagram, it appears I have a few choices as how to go about this.

I am looking for a relatively easy replacement job. Should I order:

#22 Impeller, or
10 motor assembly, or
#14 pump and motor assembly complete?

What would you recommend? Also, if I order more that one, are the unused ordered parts returnable to Appliancepartspros?

Thanks.

Clayton

I would only do the 10 Chances are that the bearings are shot in the motor.

I think I have to do the same thing, but could you tell me the difference between 10 and 20? From the pictures, it looks exactly the same.

Claytonc, Thanks, but that leads to another question. The full assembly 10 is $113.23, while just the motor 20 is $124.31. So you pay less to get more? I’m ok with that, but does seem strange to me.

I ordered 10 also. I asked the online help person about the diff in price between 10 and 20, and she said they give a price break on combinations. Still didn’t make any sense to me, but I wasn’t going to argue the issue. Thanks again for your help.