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Dorman 577-321 Fuel Filler Neck
| Brand | Dorman 577-321 |
|---|---|
| Diameter | 2 |
| Fuel Cap Included | No |
| Length | 30 |
| Material | Steel |
| Package Contents | 1 Fuel Filler Neck |
| Fits | Buick and Pontiac · 12 vehicles |
OE-style replacement. Precision-engineered for a reliable repair.
Steel construction. Built for durable fuel system service.
Fuel filler neck. Restores the fuel storage connection.
Cross-references Spectra Premium FN798 and 25666232 for the same application. See all 2.
Fuel Tank Filler Neck for Buick and Pontiac
Dorman 577-321 is a steel fuel tank filler neck for select Buick LeSabre and Pontiac Bonneville models. It is engineered and tested to match the original filler neck design for a direct repair on the listed vehicles.
Key Features
- Steel construction for fuel system service
- 30-inch length
- 2-inch diameter
- Fuel cap not included
- Designed for select 2000-2005 Buick LeSabre and 2000-2005 Pontiac Bonneville applications
Detailed Description
This Dorman fuel tank filler neck, part number 577-321, is a replacement component for vehicles with a leaking or damaged filler neck. It is built to match the original shape and fit of the OE part, helping restore the fuel fill path on 2000-2005 Buick LeSabre and 2000-2005 Pontiac Bonneville models. This part cross-references Spectra Premium FN798 for the same application.
Use Dorman 577-321 when you need a replacement fuel filler neck for Buick LeSabre or Pontiac Bonneville fuel tank service. The steel tube construction and OE-style dimensions support a direct repair on the listed fitments.
What It Helps Fix
- Fuel leaking from a cracked or rusted filler neck
- Corrosion at the fuel fill tube
- Damage to the original neck from age or road exposure
- Fuel odor caused by a compromised fill path
- Refueling issues related to a distorted or failing neck
Installation Notes and Tips
Verify vehicle fitment before installation. This part is listed for 2000-2005 Buick LeSabre and 2000-2005 Pontiac Bonneville models, with no position specified. Confirm the fuel cap is reused or replaced separately, since it is not included. Inspect adjoining fuel system components and mounting points for corrosion or damage before installing the new filler neck.
Quality Assurance
Dorman states that this replacement filler neck is precision-engineered and thoroughly tested to match the original part for the specified vehicle applications. Part number 577-321 is built for a direct-fit repair on the listed Buick and Pontiac models.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Buick | LeSabre | N/A | — |
| 2005 | Pontiac | Bonneville | N/A | — |
| 2004 | Buick | LeSabre | N/A | — |
| 2004 | Pontiac | Bonneville | N/A | — |
| 2003 | Buick | LeSabre | N/A | — |
| 2003 | Pontiac | Bonneville | N/A | — |
| 2002 | Buick | LeSabre | N/A | — |
| 2002 | Pontiac | Bonneville | N/A | — |
| 2001 | Buick | LeSabre | N/A | — |
| 2001 | Pontiac | Bonneville | N/A | — |
| 2000 | Buick | LeSabre | N/A | — |
| 2000 | Pontiac | Bonneville | N/A | — |
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