Dorman 577-824 Fuel Filler Neck

Fuel Filler Neck for Chevrolet and GMC Trucks

Dorman 577-824 is a steel fuel tank filler neck built for specific Chevrolet and GMC full-size truck 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 or corroded.

Compatible With 1988-2000 Chevrolet C2500, C3500, K2500, and K3500, plus 1988-2000 GMC C2500, C3500, K2500, and K3500, and 1988-1999 Chevrolet C1500, K1500, GMC C1500, and K1500 applications.

• Steel construction for fuel system service
• 15.8 in. length
• 2 in. inside diameter fill pipe
• Fuel cap not included
• Designed as a direct replacement for the original filler neck

Detailed Product Overview

This Dorman fuel filler neck, part number 577-824, is made for restoring the fuel fill path on select Chevrolet C/K and GMC C/K trucks. The steel tube is formed to match the original layout for the listed applications, helping address leaks, rust damage, and fitment issues at the fuel tank inlet area. This part cross-references Spectra Premium FN506 for the same application.

Common Problems This Part Can Address

• Fuel leaking near the filler neck
• Rust or corrosion in the fuel fill tube
• Damaged or cracked filler neck sections
• Difficulty refueling due to a restricted fill pipe
• Failed inspection caused by visible fuel system leakage

Installation Notes and Tips

Verify year, make, model, and fuel system routing before installation. Compare the original neck length, 2 in. fill pipe inside diameter, and mounting points to confirm proper alignment on your Chevrolet C2500, GMC K3500, or other listed truck application. Transfer any vehicle-specific components not included with the replacement as needed.

Quality Assurance

Dorman engineers this replacement filler neck to match the original part for the listed vehicles and tests it for fit and function before release. Part number 577-824 is built for dependable service in the fuel storage system on compatible Chevrolet and GMC trucks.