I bought my wife an 07 Solstice convertible a couple years ago.The AC stopped working so I put it on the ODB checker.It had the P0128 code so I erased it and the AC now works. The problem is that it had a bunch of Transmission codes pop up. I noticed that there is an inlet on the top of the transmission bell housing that has nothing attached to it. Is there supposed to be? I cannot find any loose vacum hoses nearby. is it just a plug that is supposed to be there? The codes are P0700,P0741. Any help is appreciated. Thanks.