HomeAir and Fuel Delivery > Fuel StorageSpectra FN821 Fuel Filler Neck
Part #: FN821

Spectra FN821 Fuel Filler Neck

⚙️ 5 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet and GMC, Silverado 1500 and Sierra 1500
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Reliable Fuel Tank Filler Neck for Chevrolet and GMC Trucks

The Spectra FN821 fuel tank filler neck is designed specifically for Chevrolet Silverado 1500 and GMC Sierra 1500 models. This replacement part ensures proper fuel delivery and secure connection between the fuel cap and tank, maintaining your vehicle's fuel system integrity.

  • Compatible with Chevrolet Silverado 1500 and GMC Sierra 1500
  • Durable construction for long-lasting performance
  • Direct replacement for original equipment part number FN821
  • Ensures proper fuel flow and prevents leaks
  • Easy to install with standard tools

Product Details and Compatibility

The Spectra FN821 fuel tank filler neck is engineered to meet the specifications required for Chevrolet and GMC full-size pickup trucks, specifically the Silverado 1500 and Sierra 1500 models. This part connects the fuel filler cap to the fuel tank, providing a sealed path for refueling. Manufactured with quality materials, it resists corrosion and wear from exposure to fuel and environmental elements. Using the correct filler neck helps maintain fuel system pressure and prevents fuel vapors from escaping, which is critical for emissions compliance and vehicle safety.

Common Applications and Problem Resolution

This fuel tank filler neck is used to replace worn or damaged filler necks that can cause issues such as:

  • Fuel leaks around the filler area
  • Difficulty refueling due to clogged or damaged filler neck
  • Check engine light triggered by fuel system pressure loss
  • Fuel odor near the vehicle due to vapor leaks
  • Corrosion or physical damage from road debris or age

Installation Notes and Tips

Installation of the Spectra FN821 fuel tank filler neck is straightforward for technicians familiar with fuel system components. It is recommended to:

  • Relieve fuel system pressure before removal
  • Use appropriate safety measures to avoid fuel spills
  • Inspect surrounding fuel lines and seals for wear
  • Ensure all clamps and connections are securely tightened
  • Test for leaks after installation

Quality Assurance and Warranty Information

Spectra parts are manufactured to meet or exceed OEM standards for fit and function. The FN821 fuel tank filler neck undergoes quality control inspections to ensure durability and performance. While specific warranty details may vary, Spectra typically offers a limited warranty against defects in materials and workmanship, providing confidence in the replacement part's reliability.

This part fits 5 vehicles. Search below:

YearMakeModelBed TypeLitersCylindersFuel TypePositionNotes
2004ChevroletSilverado 1500Stepside6.0LV8N/A
2004ChevroletSilverado 1500Stepside5.3LV8GASN/A
2004ChevroletSilverado 1500Stepside4.8LV8N/A
2004GMCSierra 1500Stepside5.3LV8GASN/A
2004GMCSierra 1500Stepside4.8LV8N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1507754015113985577870TNKFN821

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.