what part is that on top of the roof.? it looks like a shark fin? on 2012 Buick LaCrosse

my wife was backing out of the garage and didn't allow the door to fully go up. The bottom of the door hit that "little shark fin thing" and raised it up about 1/2 inch. What is the name of that piece and is it inexpensive to repair?

by in Maiden, NC on February 04, 2013
1 answer
ANSWER by on March 27, 2015
the thing that gives radio reception begins with an A.

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