OE Quality
60-Day Returns

Dorman 577-823 Fuel Filler Neck
Overview of Dorman Fuel Tank Filler Neck 577-823
The Dorman 577-823 fuel tank filler neck is designed for reliable fuel delivery in select Oldsmobile and Pontiac vehicles. Constructed from durable steel, this fuel filler neck ensures a secure connection between the fuel cap and the fuel tank for models like the Montana, Silhouette, and Trans Sport.
- Made from corrosion-resistant steel for long-lasting durability
- Length of 30.4 inches for proper fitment and installation
- Fuel cap not included, compatible with existing fuel caps
- Fill pipe inside diameter measures 1.37 inches for accurate fuel flow
- Includes one fuel filler neck per package
Detailed Product Description
The Dorman 577-823 fuel tank filler neck is engineered to meet the specifications required for Oldsmobile Montana, Pontiac Silhouette, and Pontiac Trans Sport models. Its steel construction provides strength and resistance to wear caused by exposure to fuel and environmental elements. The 30.4-inch length and 1.37-inch inside diameter of the fill pipe ensure proper alignment and fuel flow during refueling. This part is designed to replace worn or damaged filler necks, restoring the integrity of the fuel storage system.
Compatible Vehicles and Applications
This fuel tank filler neck is compatible with the following vehicles:
- Oldsmobile Montana
- Pontiac Silhouette
- Pontiac Trans Sport
Use the Dorman 577-823 to address issues related to fuel delivery and tank access on these specific models.
Common Issues Addressed by This Fuel Filler Neck
- Cracks or leaks in the existing filler neck causing fuel odors or leaks
- Corrosion or rust compromising the fuel system integrity
- Difficulty refueling due to damaged or misaligned filler neck
- Fuel cap not sealing properly because of a worn filler neck
- Replacement of a broken or bent filler neck after an accident or wear
Installation Notes and Tips
Installation of the Dorman 577-823 fuel tank filler neck requires basic mechanical skills and tools. Ensure the vehicle is parked on a level surface and the fuel system is depressurized before beginning. Remove the old filler neck carefully to avoid damage to the fuel tank or surrounding components. Verify the 30.4-inch length and 1.37-inch inside diameter match the original part for proper fitment. Tighten all clamps securely to prevent leaks. Since the fuel cap is not included, reuse the existing cap or purchase separately if needed.
Quality Assurance and Warranty
Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 577-823 fuel tank filler neck undergoes quality inspections to ensure durability and performance. Warranty coverage details can be obtained from the product documentation or Dorman directly, providing assurance of product reliability for Oldsmobile Montana and Pontiac Silhouette and Trans Sport owners.
| Brand | Dorman |
| Part Number | 577-823 |
| Fill Pipe Inside Diameter | 1.37 |
| Fuel Cap Included | No |
| Length | 30.4 |
| Material | Steel |
| Package Contents | 1 Fuel Filler Neck |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2000 | Oldsmobile | Silhouette | N/A | |
| 2000 | Pontiac | Montana | N/A | |
| 1999 | Oldsmobile | Silhouette | N/A | |
| 1999 | Pontiac | Montana | N/A | |
| 1998 | Oldsmobile | Silhouette | N/A | |
| 1998 | Pontiac | Trans Sport | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.