This replacement fuel filler neck is just what you need to get your vehicle in good working order again!


  • Fits between outer 1/4 panel and filler hose
  • Configuration:
    • (1) Main filler tube
    • (1) Vent Tube
  • Replaces dealer part numbers: 25631945, 25642323
  • Built to strict quality control standards
  • Replaces any gas tank filler neck that is rusted, rotted, bent, or damaged from an accident
  • Will only fit filler necks that use a snap lock type of gas cap
    • Will not fit the Screw Type of gas cap
  • Does not fit station wagon models

Note: If there is any question about this filler neck fitting your vehicle, please ask your local dealer if the above OE numbers will fit your application.

This fuel filler neck is a great replacement and has good cost savings over a gas tank filler neck from the dealer.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

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Vehicle Fit

  • 1996-1999 Buick LeSabre Fuel Tank Filler Neck for Models with Twist-Lock Gas Cap
  • 1996-1999 Olds 88 Fuel Tank Filler Neck (excluding Supercharged Models)
  • 1996-1999 Olds Regency Fuel Tank Filler Neck (excluding Supercharged Models)
  • 1996-1999 Pontiac Bonneville Fuel Tank Filler Neck (excluding Supercharged Models)

This part replaces:

  • OE # 25631945
  • Dorman 577-917
  • Spectra Premium Industries FN631
Part #: 1AFMX00056