Product review (2 stars): like me, you need to decide if you want ...
Well, don't buy just the solenoid if yours goes.  When you put it in, it will work, but the flap which diverts between wash and drain will begin to drip.  Then, like me, you need to decide if you want to replace the whole pump assembly or take a chance the dripping will stop.

GE, which makes the pump assembly, advises not to replace the solenoid only in their paperwork that comes with the new pump assembly.

Save the hassle and go for the full pump assembly, not just the solenoid.  This avoids the labor of putting in just the solenoid and soon after taking the whole machine out to install the pump assembly. I recommend the full assembly and it works fine... no leaks.