
Dorman 577-948 Fuel Tank Filler Neck - Upper
Fuel Tank Filler Neck for Select GM SUVs
This Dorman fuel tank filler neck is a direct replacement for leaking filler necks on select Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada models. Built from steel and engineered to match the original shape and dimensions, Part Number 577-948 supports a reliable fuel system repair for the upper filler neck location.
- Steel construction for durable fuel system service
- Length: 18.3 in.
- Fill pipe inside diameter: 2 in.
- Fuel cap not included
- Designed for the upper filler neck position
- Compatible with 1997-2000 Chevrolet Blazer, upper
- Compatible with 1997-2000 GMC Jimmy, upper
- Compatible with 1997-2000 Oldsmobile Bravada, upper
Detailed Product Information
Dorman 577-948 is a replacement fuel tank filler neck engineered for specific GM applications where the original neck has corroded, cracked, or begun leaking. The steel tube is built to match the original filler neck profile for the listed vehicles, helping restore proper fuel transfer from the fuel door area to the tank. This part cross-references Spectra Premium FN855 for the same application.
Common Repair Applications
- Fuel odor near the rear quarter panel or fuel door
- Visible rust or perforation in the filler neck
- Fuel leakage during refueling
- Slow or difficult fueling caused by a restricted neck
- Damaged upper filler neck on a 1997-2000 Chevrolet Blazer, upper
Installation Notes and Tips
Verify the vehicle’s upper filler neck configuration before installation and compare the original part to the replacement for length, diameter, and routing. Inspect connected hoses, clamps, and sealing surfaces during service, and confirm the fuel cap is reused or replaced separately as needed since it is not included.
Quality Assurance
Dorman tests this replacement filler neck to match the original part for the specified vehicle years, makes, and models. Part Number 577-948 is intended to provide a dependable repair for select Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada applications.
Original: $96.60
-65%$96.60
$33.81Dorman 577-948 Fuel Tank Filler Neck - Upper
Fuel Tank Filler Neck for Select GM SUVs
This Dorman fuel tank filler neck is a direct replacement for leaking filler necks on select Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada models. Built from steel and engineered to match the original shape and dimensions, Part Number 577-948 supports a reliable fuel system repair for the upper filler neck location.
- Steel construction for durable fuel system service
- Length: 18.3 in.
- Fill pipe inside diameter: 2 in.
- Fuel cap not included
- Designed for the upper filler neck position
- Compatible with 1997-2000 Chevrolet Blazer, upper
- Compatible with 1997-2000 GMC Jimmy, upper
- Compatible with 1997-2000 Oldsmobile Bravada, upper
Detailed Product Information
Dorman 577-948 is a replacement fuel tank filler neck engineered for specific GM applications where the original neck has corroded, cracked, or begun leaking. The steel tube is built to match the original filler neck profile for the listed vehicles, helping restore proper fuel transfer from the fuel door area to the tank. This part cross-references Spectra Premium FN855 for the same application.
Common Repair Applications
- Fuel odor near the rear quarter panel or fuel door
- Visible rust or perforation in the filler neck
- Fuel leakage during refueling
- Slow or difficult fueling caused by a restricted neck
- Damaged upper filler neck on a 1997-2000 Chevrolet Blazer, upper
Installation Notes and Tips
Verify the vehicle’s upper filler neck configuration before installation and compare the original part to the replacement for length, diameter, and routing. Inspect connected hoses, clamps, and sealing surfaces during service, and confirm the fuel cap is reused or replaced separately as needed since it is not included.
Quality Assurance
Dorman tests this replacement filler neck to match the original part for the specified vehicle years, makes, and models. Part Number 577-948 is intended to provide a dependable repair for select Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada applications.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Fuel Tank Filler Neck for Select GM SUVs
This Dorman fuel tank filler neck is a direct replacement for leaking filler necks on select Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada models. Built from steel and engineered to match the original shape and dimensions, Part Number 577-948 supports a reliable fuel system repair for the upper filler neck location.
- Steel construction for durable fuel system service
- Length: 18.3 in.
- Fill pipe inside diameter: 2 in.
- Fuel cap not included
- Designed for the upper filler neck position
- Compatible with 1997-2000 Chevrolet Blazer, upper
- Compatible with 1997-2000 GMC Jimmy, upper
- Compatible with 1997-2000 Oldsmobile Bravada, upper
Detailed Product Information
Dorman 577-948 is a replacement fuel tank filler neck engineered for specific GM applications where the original neck has corroded, cracked, or begun leaking. The steel tube is built to match the original filler neck profile for the listed vehicles, helping restore proper fuel transfer from the fuel door area to the tank. This part cross-references Spectra Premium FN855 for the same application.
Common Repair Applications
- Fuel odor near the rear quarter panel or fuel door
- Visible rust or perforation in the filler neck
- Fuel leakage during refueling
- Slow or difficult fueling caused by a restricted neck
- Damaged upper filler neck on a 1997-2000 Chevrolet Blazer, upper
Installation Notes and Tips
Verify the vehicle’s upper filler neck configuration before installation and compare the original part to the replacement for length, diameter, and routing. Inspect connected hoses, clamps, and sealing surfaces during service, and confirm the fuel cap is reused or replaced separately as needed since it is not included.
Quality Assurance
Dorman tests this replacement filler neck to match the original part for the specified vehicle years, makes, and models. Part Number 577-948 is intended to provide a dependable repair for select Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada applications.












