Navigational (global Positioning System) Gps problems of the 2011 Chevrolet Equinox

First time owner of this vehicle. The end of June, 2014 began noticing that the gps would not save destinations when traveling, would have to reenter address anytime the ignition was turned off and back on. Shortly after this, the clock stopped working, when the time was corrected, if would reset after ignition was turned off and back on to the incorrect time. The bluetooth also began randomly disconnecting and would not connect anymore. Sept. 24th, the vehicle was brought to dealership where purchased to see what was wrong. Owner was told the entire navigation system would have to be replaced, for quoted $1300. Owner not satisfied, was told that it was a defect from the manufacturer, and that there was bad wiring. Owner feels that gm should cover the defective part. If bad wiring exists, this could be a safety hazard. Owner also found service bulletin pi-0285-d, which was consistent with the problems that had been occurring. Due to the fact that the owner did not purchase an extended warranty, gm will only cover a percentage of the cost to replace the defective part.