I can hear it and it does sound like it is under the sink but the slide is in and I can not get to it today (to cold 16 degree's) It will be in the 50s tomorrow so I will check it then. Thanks for all the help.
I would have thought someone would have known right where the water pump was...close but no cigar... It is in the cabinet on the back wall next to the frig. you have to remove two panels where there are no shelfs.