Ignition Anti-theft Immobilizer/proximity Key/sender problems of the 2003 Chevrolet Malibu

The contact owns a 2003 Chevrolet Malibu. The contact stated that the key ignition which was inoperable, however the contact stated that the key ignition switch had been replaced three times by sands Chevrolet and the failure has reoccurred. The vehicle was towed to a independent mechanic where it was diagnosed with key switch failure and the ignition needed replaced, however the vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 170,000. Sands Chevrolet 16991 west waddell rd surprise az 85388.