Dorman 577-823 Fuel Filler Neck

Fuel Tank Filler Neck for Select GM Vans

Dorman 577-823 is a steel fuel tank filler neck made for specific Oldsmobile, Pontiac, and related GM applications. It is precision-engineered and tested to match the original filler neck design for a reliable repair when the fuel filler neck is leaking.

Key Features

• Steel construction for fuel system durability
• 30.4 in. length for the specified vehicle applications
• 1.37 in. inside diameter fill pipe
• Direct replacement style for original filler neck fitment
• Fuel cap not included
• Package contents: 1 fuel filler neck

Detailed Description

This Dorman fuel tank filler neck is built for direct replacement use on 1998 Pontiac Trans Sport, 1998-2000 Oldsmobile Silhouette, and 1999-2000 Pontiac Montana applications. Part number 577-823 is engineered to match the original filler neck dimensions and configuration so the fuel inlet area can be restored without changing the vehicle’s intended layout. This part cross-references Spectra Premium FN554 and 10425290 for the same application.

For buyers searching for a 1998 Pontiac Trans Sport fuel filler neck, a 1998-2000 Oldsmobile Silhouette filler neck, or a 1999-2000 Pontiac Montana fuel tank filler neck, this replacement is built around the original vehicle fitment and steel construction. The Dorman 577-823 filler neck is intended for a straightforward OE-style repair on these specific GM vans.

What It Helps Fix

• Fuel filler neck leaks at the tank inlet area
• Corrosion or rust damage in the filler tube
• Cracked or deteriorated original filler neck tubing
• Fuel odor caused by a compromised filler neck
• Refueling issues related to a damaged fill pipe

Installation Notes and Tips

Verify vehicle year, make, and model before ordering. This part is listed for 1998 Pontiac Trans Sport, 1998-2000 Oldsmobile Silhouette, and 1999-2000 Pontiac Montana applications. Confirm the fill pipe inside diameter and overall length against the original part during service. Fuel cap is not included, so reuse or replace the cap separately as needed.

Quality Assurance

Dorman states that this replacement filler neck is thoroughly tested and engineered to match the original part for the listed vehicle applications. Part number 577-823 is built as a direct-fit repair component for the specified GM fuel system applications.