2002 Chevy Venture Windshield miper motor

2002 Chevy Venture 6 cyl Front Wheel Drive Automatic

The problem I have is that the front windshield wipers aren't returning to the bottom when the switch is in park. The wipers work properly otherwise! It's my understanding that this is a common thing on this vehicle. How can I fix this problem? I was told I have to replace the wiper motor, is the wiper motor the culprit? Is there another possability? Thank you Paul84