Forwinparts Fuel Filler Neck with Cap for Chevy/GMC C/K 1500–3500 (1988–2000) — 14.25in Gasoline Venting

Forwinparts Fuel Gas Tank Filler Neck Hose with Cap is a direct-fit replacement filler pipe assembly for 1988–2000 Chevy and GMC C1500–C3500 and K1500–K3500 trucks and Suburbans, offered with matching cap and multiple OEM part-number compatibilities.

This replacement fuel filler neck and cap from Forwinparts restores a secure, properly routed fuel fill point for older Chevrolet and GMC full-size pickups and Suburbans. Built to match original dimensions and venting, the assembly fits a broad range of C- and K-series models from 1988 through 2000 and is labeled with several cross-reference numbers for easy identification. The unit is intended for gasoline-fueled tanks and includes the necessary cap for a tidy installation.

Which vehicles and model years does this filler neck fit?

This Forwinparts filler neck covers many Chevrolet and GMC full-size pickup and Suburban applications between 1988 and 2000. It is designed to replace OE-style filler pipes used on C1500, C2500, C3500 and K1500, K2500, K3500 chassis as well as Suburban variants within those series.

• Chevrolet: C1500/C2500/C3500 and K1500/K2500/K3500 Pickup and Suburban models (1988–2000)
• GMC: C1500/C2500/C3500 and K1500/K2500/K3500 Pickup and Suburban models (1988–2000)
• Cross-referenced to part numbers: 15003858, 15712144, 577-824, 577824

What are the key specifications and materials?

The assembly is sized to match common original equipment dimensions so it routes and seals correctly at the vehicle’s tank opening. It supports gasoline and includes venting details important for safe filling operations.

• Fuel compatibility: Gasoline
• Fill-pipe inside diameter: 2 inches
• Total length: 14.25 inches
• Vent port inside diameter: 0.625 inches
• Includes matching fuel cap for a complete replacement

How easy is it to install and what should I check during replacement?

Installation is straightforward for anyone with basic automotive tools and familiarity with fuel-system components. Verify the alignment of the filler pipe to the tank inlet, ensure clamps and seals are secure, and replace any rusted mounting hardware for a durable repair.

• Compare old part to new using length and diameters before starting
• Inspect mounting brackets and replace corroded clamps
• Tighten connections to prevent leaks and confirm vent path is unobstructed
• Test fill cap fit and seal after installation

Which part numbers and cross-references does this unit replace?

Forwinparts provides compatibility listings to simplify part selection and help match the replacement to the original equipment number. Several common OEM and aftermarket identifiers are referenced so you can verify fitment against your vehicle’s existing part.

• Referenced part numbers: 15003858, 15712144
• Also cross-referenced: 577-824, 577824
• Aftermarket identifiers: FN525, SKFN506, FNH158

Who this is for: This fuel filler neck and cap assembly is intended for owners, mechanics, and restoration enthusiasts working on 1988–2000 Chevrolet and GMC full-size pickups and Suburbans who need a reliable, OEM-dimension replacement. Choose this part if your vehicle has a damaged, rusted, or leaking filler pipe or if you’re restoring the fuel-filling area to factory functionality. Forwinparts backs the product with a one-year unlimited-mileage warranty and customer support for installation questions.