Spectra FN821 Fuel Filler Neck

Fuel Tank Filler Neck for Silverado and Sierra

Spectra FN821 is a fuel tank filler neck for select 2004 Chevrolet Silverado 1500 and 2004 GMC Sierra 1500 applications. It is built to match original equipment fit and function for direct replacement service.

Key Features

• Direct replacement fuel tank filler neck for OE-style fitment
• Engineered and manufactured to meet or exceed original equipment performance targets
• Quality-controlled construction for consistent fit and function
• Fits 2004 Chevrolet Silverado 1500, N/A
• Fits 2004 GMC Sierra 1500, N/A

Detailed Description

This Spectra fuel tank filler neck is part number FN821 and is intended for 2004 Chevrolet Silverado 1500 and 2004 GMC Sierra 1500 trucks. It supports proper fuel fill routing and replacement of a worn, damaged, or corroded filler neck while maintaining OE-style dimensions and performance. This part cross-references TNKFN821 for the same application.

Common Replacement Reasons

• Corrosion or rust at the filler neck
• Fuel odor near the tank area
• Damage from road debris or impact
• Fuel filling issues caused by a restricted or deteriorated neck
• Visible leaks or seepage around the filler tube

Installation Notes and Tips

Verify vehicle fitment by year, make, and model before installation. Inspect the surrounding fuel fill components, clamps, and sealing surfaces during replacement, and transfer any vehicle-specific connections or retainers as required by the application.

Quality Assurance

Spectra uses engineering, manufacturing technology, and quality control processes to produce fuel filler necks that meet or exceed original equipment performance expectations. Part number FN821 is built for direct replacement service on the listed Silverado and Sierra applications.