Product review (4 stars): you might just be clogged. grab the shop-vac, drain the dishwasher, and test your pump first!
this is a really excellent replacement part, although it turns out I didn't need it.
before you buy this, drain the water from your dishwasher with a shop vac and then remove this pump.
turn the dishwasher to drain cycle and see if the motor spins.
in my case, there was a small bit of broken glass caught in the impeller which caused it to stall.
I was able to reinstall the pump and up and  running again in 30 minutes.

this pump takes  just a half-turn to remove while pinching a right-angle lock tab in the back which prevents it from turning.
very easy to remove and replace.

So you're about to order a pump for your dishwasher that won't drain, You might as well pull your existing pump and see if it spins before you order a replacement,  You might just be clogged and not need a new one at all!