Not even sure exactly what this is called but it is the oval shaped rubber grommet looking thingy that goes in the bottom of the bell housing on the Hummer H3. It may be called a clean out plug even though there are two other round holes in the bell housing used for clean outs. I have searched everywhere online and cannot find anything on this oval rubber plug. Maybe cant find it because I don't know the actual name of it. Would any of you guys happen to know what this piece is called or where it can be purchased? Recently purchased this 2006 H3 and was changing the fluids when I noticed all of the open holes in the bell housing. Can't imagine going through mud with these holes wide open. Picture is in the attached word document that I screen shot from a similar post on here.

 

see this post for help in finding a donor vehicle that may have your part.
https://www.hummerforums.com/forum/p...y-%2475-46307/