My 06 GT is at the dealership for a slight hesitation on acceleration after freeway driving. Even though there is a service bulletin for the fuel pump, the service dept. can't duplicate the problem and is refusing to fix it. I still have the slow speed growl in the rearend after replacement and they can't hear that either. Can anyone give me a regional contact # for service support? The dearlership service mngr has be no help. I live in Portland Oregon and would like to contact someone above these buttheads. Thanks.