ONSTAR GPS FAILED TO LOCATE MY VEHICLE WHEN REPORTING AN ACCIDENT I WAS INVOLVED IN 5/4/2018. THE GPS ANTENNA IS THE FAILING COMPONENT. THIS HAS BEEN IDENTIFIED IN GM SERVICE BULLETIN 15155. UNDER THIS BULLETIN OWNERS WHERE SUPPOSED TO BE NOTIFIED OF THE ISSUE, I WAS NOT. GM WILL NOT HONOR THE REPAIR BECAUSE THE BULLETIN EXPIRED. IF THIS ACCIDENT WAS MAJOR AND I HAD NOT BEEN ABLE TO RELAY MY LOCATION EMERGENCY SERVICES WOULD NOT HAVE BEEN ABLE TO RENDER CARE. THE FAILURE OF THIS SAFETY PRODUCT AND MONITORING SERVICE SHOULD BE CORRECTED BY GM.