ACDelco GM Original Equipment Fuel Tank Filler Neck is a GM-recommended replacement component for one or more of the following vehicle systems: ignition, and/or engine fuel management. This original equipment neck will provide the same performance, durability, and service life you expect from General Motors. AC Delco fuel filler neck’s built a reputation in the automotive industry for quality and craftmanship. We manufacture fuel filler neck’s for virtually every automobile on the road today.