Hi Vicki,
Most likely the problem is a bad sequence switch (#904 on the
break down diagram).
- The part number for the sequence switch is
AP2039701
Here are the break down diagram for the GE dishwasher
Model GSD4010Z02AA
Gene.
P.S. It is a bad habit to leave a running dishwasher unattended. You can find your office or kitchen in very poor condition