Keystone GM3900109 OEM Replacement Fuel Tank 20-Gallon Without EEC With Filler Neck

The Keystone GM3900109 is an OEM-style replacement fuel tank designed for the 1970 Chevrolet Chevelle. This 20-gallon tank is the correct fitment for vehicles without an Evaporative Emission Control (EEC) system and without vent tubes, making it the proper match for non-EEC-equipped models that rely on a vented fuel cap rather than an evaporative emissions canister setup.

This tank arrives with the filler neck pre-installed, simplifying the replacement process. It is engineered as a direct bolt-in replacement, restoring the original factory fuel capacity and routing without requiring modification.

Key Features:

• 20-gallon capacity — matches original OEM fuel volume
• Filler neck included — ready for installation out of the box
• Without EEC (Evaporative Emission Control) — correct for non-EEC 1970 Chevelle models without vent tubes
• OEM-style design — direct replacement for original factory fuel tank
• Replaces OEM part number 3998309

This tank is intended for 1970 Chevelle applications originally built without the evaporative emissions control system. Always verify your vehicle's original tank configuration before ordering to ensure correct fitment. Keystone Automotive Industries is a trusted supplier of OEM-style collision and mechanical replacement parts.