Kenmore 665.17052400 won't drain after washing. Suspect there is a clog in the drain, inside of the dish washer. Question is; what is the procedure for removing the upper wash and rinse parts so that the drain can be examined?

If it won't drain then check under your sink first. Take the drain hose connection off and see if it will drain into a bucket. Make sure the nipple under the sink is not plugged or the end of the drain hose that is attached to it. Next remove the bottom access panel and find the drain hose on the drain motor. There is a check valve there you can check.