Peterbilt 589 Fuel Tanks

Frequently Asked Questions About Peterbilt 589 Fuel Tanks

Will this fuel tank fit my Peterbilt 589 without modification?

Fuel tanks for the Peterbilt 589 are designed to match the factory mounting locations and frame specifications for this model, but tank capacity, shape, and strap configuration can vary by build. Always check the listed dimensions, mounting hole spacing, and capacity against your truck's original tank or build sheet before ordering to ensure a proper fit.

What materials are these fuel tanks made from, and does it affect performance or durability?

Peterbilt 589 fuel tanks are typically available in aluminum or steel construction. Aluminum tanks are lighter and naturally corrosion resistant, which helps reduce overall vehicle weight and long-term rust concerns, while steel tanks tend to offer added durability in high-impact environments. The right choice often comes down to your priorities around weight savings versus ruggedness.

How do I know what size or capacity tank I need?

Tank capacity is usually determined by your route length, fuel stop availability, and how the tank pairs with any second tank on the opposite frame rail. Measuring your existing tank's length, diameter, and mounting strap spacing is the most reliable way to confirm you are ordering a matching capacity and physical fit.

What is involved in installing a replacement fuel tank?

Installation generally involves draining and disconnecting the old tank, removing the mounting straps and fuel lines, positioning the new tank on the frame brackets, and reconnecting fuel lines, vents, and sending unit wiring. Because fuel system work involves safety considerations, installation should be performed by a qualified technician familiar with Peterbilt fuel systems.

Do these fuel tanks come with the sending unit, straps, or other hardware included?

This varies by listing, so it is important to check the product description for what is included. Some tanks ship as a bare tank only, while others may include mounting straps, brackets, or a sending unit. If your tank does not include these components, you will need to reuse your existing hardware or purchase them separately.