Where does this go?
Guess it has to cost over three dollars to get a picture 
http://www.gmpartsdirect.com/results...umber=15230751
http://www.gmpartsdirect.com/results...umber=15230751
A quick search showed that part to be used on a lot of GM vehicles in different places. In short terms, it is some type of drain tube. Most likely from the cowl area or maybe even a sunroof drain part.
Which side of the car? If its what i think it is,,squarish with a scoop like opening,,then it goes inside the wheel well above the tire facing aft..Ive knocked mine off several times power washing the wells..it directs the drain off water away from the spindle areas, also might just be a vent, shaped like that to keep ram air out..


