Peterbilt 389 Glider Diesel Fuel Tanks

Frequently Asked Questions About Peterbilt 389 Glider Diesel Fuel Tanks

Will these fuel tanks fit my Peterbilt 389 Glider without modification?

Peterbilt 389 Glider fuel tanks are designed to match the factory frame width and mounting points used on the 389 platform, but exact fit can vary depending on tank diameter, length, and the specific frame rail spacing on your truck. Its important to confirm the mounting hole pattern, strap style, and overall dimensions against your existing setup or build specs before ordering, especially if your glider kit uses a non-standard frame configuration.

What materials and finish options are available for these fuel tanks?

These tanks are commonly available in aluminum and polished stainless steel, with options for a mirror-polished finish, brushed finish, or raw/unpolished surface depending on the manufacturer. Polished stainless and aluminum tanks offer a cleaner appearance for show trucks, while unpolished options are often chosen for working trucks where finish is less of a priority. Always check the listing for the specific gauge and material called out for each tank.

What fuel capacity sizes are offered, and how do I choose the right one?

Capacities typically range from smaller step tanks to larger round or D-shaped tanks holding well over 100 gallons, depending on the diameter and length selected. Choosing the right size depends on your desired range between fill-ups, available frame space, and any weight distribution considerations for your specific glider build. Measuring your available frame rail space and comparing it to the tanks listed dimensions is the best way to narrow down the correct fit.

What is involved in installing a replacement or upgraded fuel tank?

Installation generally involves removing the old tank and mounting straps, transferring or replacing fittings such as the fuel pickup, sending unit, and vent lines, then securing the new tank using the provided or existing mounting brackets and straps. Because fitting locations and thread sizes can differ between tank brands, its a good idea to compare your old tank's fittings to the new one before starting the job to avoid needing extra adapters or modifications.

How do I maintain a polished fuel tank to keep it looking new?

Polished aluminum and stainless tanks require regular cleaning with a metal-safe polish and a microfiber cloth to prevent oxidation, road film buildup, and water spotting. Frequent washing, especially after winter driving or exposure to road salt, combined with periodic re-polishing, will help maintain the shine and protect the metal surface over time.