Don't waste your time speaking to General Motors Customer Service-Worthless!!!!!. They only support the dealer.
It appears that GM is not interested in doing the right thing by it's customers. Sad to say now I wish they had not been bailed out-they only produce *** cars-including the Cadillac.
I don't think it's too much to ask GM to hold accountable General Managers and their assigned dealership/service departments for the poor work that they do -they are certainly getting paid for it! Maybe a class action law suit from pissed off customers is what they need!