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Dorman 577-379 Fuel Filler Neck - Upper
| Brand | Dorman 577-379 |
|---|---|
| Fill Pipe Inside Diameter | 1.125 |
| Fuel Cap Included | No |
| Length | 33 |
| Material | Steel |
| Package Contents | 1 Filler Neck; 1 Ground Wire |
| Fits | Buick, Chevrolet, GMC, and Oldsmobile · 10 vehicles |
OE direct replacement. Precision-engineered and thoroughly tested for a reliable repair.
Steel construction. Built for durable fuel system service.
Fuel filler neck. Restores the fuel tank fill path with a direct-fit replacement.
Cross-references SKP SK577379, Spectra Premium FN727 and 15038562 for the same application. See all 3.
Fuel Tank Filler Neck Replacement
Dorman 577-379 is a steel fuel tank filler neck replacement for specific Buick, Chevrolet, GMC, and Oldsmobile applications. It is precision-engineered and tested to match the original filler neck for a reliable repair when the fuel filler neck is leaking or corroded.
Key Features
- Steel construction for durable fuel system service
- 33-inch length for the specified vehicle applications
- 1.125-inch inside diameter fill pipe
- Includes a ground wire for the listed application
- Fuel cap not included
- Direct replacement for the original filler neck on select vehicles
Detailed Description
This Dorman fuel tank filler neck is built for direct replacement service on 2002-2004 Chevrolet Trailblazer, 2002-2004 GMC Envoy, 2004 Buick Rainier, and 2002-2004 Oldsmobile Bravada applications, including 2002-2003 Oldsmobile Bravada upper position fitment. The Dorman 577-379 is engineered to match the original part’s form and function, helping restore proper fuel fill operation and sealing at the tank inlet. This part cross-references Spectra Premium FN727 for the same application.
What It Helps Fix
- Fuel filler neck leaks
- Corrosion or rust damage at the filler tube
- Fuel odor caused by a compromised neck assembly
- Difficulty refueling due to a damaged fill pipe
- Failed inspection from visible fuel system deterioration
Installation Notes and Tips
Verify vehicle year, make, model, and position before installation. Compare the original filler neck length, inside diameter, and mounting points to confirm proper alignment on your Chevrolet Trailblazer, GMC Envoy, Buick Rainier, or Oldsmobile Bravada. Transfer any required vehicle-specific connections during service and inspect the surrounding fuel system components for corrosion or wear.
Quality Assurance
Dorman tests this replacement filler neck to match the original design for the listed applications. The steel construction and application-specific engineering support a dependable repair for fuel storage service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004 | Buick | Rainier | N/A | — |
| 2004 | Chevrolet | Trailblazer | N/A | — |
| 2004 | GMC | Envoy | N/A | — |
| 2004 | Oldsmobile | Bravada | N/A | — |
| 2003 | Chevrolet | Trailblazer | N/A | — |
| 2003 | GMC | Envoy | N/A | — |
| 2003 | Oldsmobile | Bravada | Upper | — |
| 2002 | Chevrolet | Trailblazer | N/A | — |
| 2002 | GMC | Envoy | N/A | — |
| 2002 | Oldsmobile | Bravada | Upper | — |
| No rows match your filter. | ||||