Product review (3 stars): The drain pump part is easy to replace in about ten minutes you'll be running ...
This Whirlpool / Kenmore 66513293K111,drain pump 8558995, is one of the weak part on this dishwasher.  Our dishwasher is only three years old, and we have had to replace the upper rack (track & wheels made of very cheap plastic that breaks under the heat). The drain pump part is easy to replace in about ten minutes you'll be running again.  Various vendors have it on amazon for about $30, so it is worth a try as Sears wants $60 and they needs to be ordered from the factory, with an estimate of ten days.