I just got off the phone with Apple to resolve this issue as an icon which shows fine when one goes to get info does not similarly show in the finder sidebar as such, it rather shows a document icon which is wrong. Apple said it is Totalfinder.
I have just installed the newest update of totalfinder which resolves the dock icon but this is a harddrive icon which is on the Finder sidebar. Please help. I can send you a screenshot if you want.