GM Genuine Parts Fuel Filler Neck Adapters are designed, engineered, and tested to rigorous standards, and are backed by General Motors.These neck adapters are reusable and are implemented for vacuum/pressure-decay testing and smoke testing of the EVAP system.GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

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• Allows for testing of the EVAP system
• Helps create an airtight seal
• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
• GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
• GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle