Freightliner FLC120 Diesel Fuel Tanks

Frequently Asked Questions About Freightliner FLC120 Diesel Fuel Tanks

Will this fuel tank fit my FLC120 without modification?

Fuel tank fitment depends on your truck's specific frame width, mounting bracket configuration, and tank capacity from the factory. Because the FLC120 was produced over many model years with different setups, we recommend checking the listed dimensions, mounting hole spacing, and strap style against your current tank before ordering to ensure a direct bolt-up fit.

What materials are these replacement fuel tanks made from, and does it matter?

Diesel fuel tanks for the FLC120 are typically available in aluminum or steel. Aluminum tanks are lighter and naturally resistant to rust, which can help with fuel economy and long-term corrosion concerns, while steel tanks tend to be more budget-friendly and rugged for heavy-duty applications. The right choice usually comes down to your priorities around weight savings versus upfront cost.

Are these tanks sold new, used, or reconditioned?

You'll find a mix of new aftermarket tanks and quality-inspected used take-off tanks in this category. Used tanks are pulled from working trucks and checked for structural integrity and leaks, while new tanks come without any prior wear. Each listing specifies the condition so you can choose based on your budget and how soon you need the part installed.

What should I check before installing a replacement fuel tank?

Before installation, inspect the mounting straps, brackets, and fuel lines for wear, since these components often need to be reused or replaced alongside the tank itself. It's also important to confirm the sending unit and fuel pickup locations match your truck's existing fuel system so the gauge and fuel delivery continue to work correctly after the swap.

Do these fuel tanks come with mounting hardware or a sending unit included?

This varies by listing. Some tanks include the mounting straps and sending unit, while others are sold as the bare tank only. Be sure to read the product description closely or contact our sales team to confirm exactly what's included before you order, so you're not caught short on installation day.