look closely theres a thru pin and a retaining clip that secures it, watch the second half of the video
http://www.youtube.com/watch?v=H4024W_5I4w
http://www.corvetteforum.com/parts-and-accessories/exterior/how-to-replace-your-corvettes-wipers.php
http://www.corvetteforum.com/techtips/viewsubtopic.php?SubTopicID=42&TopicID=2
http://www.ehow.com/how_4759555_remove-type-factory-windshield-wipers.html
http://www.ehow.com/how_4484935_replace-windshield-wipers-chevy-corvette.html
http://www.ecklers.com/corvette-windshield-wiper-blade-20-1984-1994.html
http://www.youtube.com/watch?v=H4024W_5I4w
http://www.corvetteforum.com/parts-and-accessories/exterior/how-to-replace-your-corvettes-wipers.php
http://www.corvetteforum.com/techtips/viewsubtopic.php?SubTopicID=42&TopicID=2
http://www.ehow.com/how_4759555_remove-type-factory-windshield-wipers.html
http://www.ehow.com/how_4484935_replace-windshield-wipers-chevy-corvette.html
http://www.ecklers.com/corvette-windshield-wiper-blade-20-1984-1994.html