Fuel Filler Neck
Fits Buick, Chevrolet, Oldsmobile β 23 vehicle applications
Contact us at 1-866-461-2787 for pricing
Contact us at 1-866-461-2787 for pricing
Call for PriceSelect your vehicle to check fitment.
Spectra Premium FN621 Vehicle Fitment
Fits 23 vehiclesThis Fuel Filler Neck fits Buick Roadmaster, Chevrolet Caprice, Oldsmobile Custom Cruiser vehicles.
1991-1996 Buick Roadmaster
Spectra Premium FN621 Specifications
- California_Prop 65 Message
- Y
- Material
- Steel
- Length
- 559
- Hose Included
- No
- Color
- Black
- Mounting Hardware Included
- No
Spectra Premium FN621 Interchange Numbers
This part replaces and is compatible with the following part numbers
Interchange Numbers
Spectra Premium FN621 Product Description
Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium fuel filler necks meet or exceed the performance of the original equipment they replace.
Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium fuel filler necks meet or exceed the performance of the original equipment they replace.
About Spectra Premium
Shop Spectra Premium Fuel Tank Filler Neck at Autrex with vehicle fitment details, current pricing, and checkout options for the Spectra Premium FN621. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Ratings & Reviews
Based on 47 reviews
- 538
- 46
- 31
- 21
- 11
- Direct fit, no surprisesMarc D.Verified BuyerMay 28, 2026
Lined up perfectly with the original. Install took about an hour with the right press. Solid feel back in the steering, no more clunk over bumps.
Installed on 2016 Ram 1500
- Shipped fast across CanadaJen P.Verified BuyerMay 14, 2026
Ordered on a Monday, had it by Wednesday in Calgary. Greasable fitting is a nice touch. Quality looks on par with OEM.
Installed on 2014 Chevrolet Silverado 1500
- Good part, double-check your sideSteve R.Verified BuyerApr 30, 2026
Works great so far. Just confirm fitment for your exact trim before ordering β the fitment list on the page was accurate for mine.
Installed on 2017 Ford F-150
- Quiet againAmrit S.Verified BuyerApr 19, 2026
Replaced both sides at the same time. The knocking noise is completely gone. Boot quality feels durable.
Installed on 2015 GMC Sierra 1500
- Would buy againDaniel L.Mar 22, 2026
Second one I've bought from Autrex. Packaging was secure and the part matched the photos exactly.
Installed on 2013 Dodge Durango
Frequently Asked Questions β Spectra Premium FN621
What vehicles does the Spectra Premium FN621 fit?
The Spectra Premium FN621 fits 3 vehicle applications including 1991-1996 Buick Roadmaster, 1991-1996 Chevrolet Caprice, 1991-1992 Oldsmobile Custom Cruiser. Check the full fitment list above to confirm your vehicle.
What parts does the Spectra Premium FN621 replace?
The Spectra Premium FN621 is a direct replacement for TNKFN621, 577279, 4063135, FNGM153, 10178634. See the full interchange list for all compatible replacements.
What are the shipping options for the Spectra Premium FN621?
Shipping options for the Spectra Premium FN621 are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
What is the price of the Spectra Premium FN621?
For current pricing on the Spectra Premium FN621, please call us at 1-866-461-2787. Availability and final order details are confirmed before checkout is completed.
Is the Fuel Filler Neck a direct fit replacement?
Yes, the Fuel Filler Neck by Spectra Premium is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
What warranty does the Fuel Filler Neck come with?
The Fuel Filler Neck comes with the standard Spectra Premium manufacturer warranty. Please check the product specifications for exact warranty terms.