Well. I thank you for your reply, but it is not a vacuum hose as I learned today. I had stated in my original post - that I looked for dangling hoses, but that nipple has nothing on it in several other HHRs I looked at today. The problem - I learned today, is the transmission, or specifically - the Torque Converter. The noise got progressively worse today, and eventually made a loud racket, and then the worst "NO DRIVE". I do thank you for the prompt response though.
Tuesday, January 8th, 2013 AT 8:19 PM