Peterbilt 389 Glider Fuel Tanks

Frequently Asked Questions About Peterbilt 389 Glider Fuel Tanks

What size fuel tanks are available for Peterbilt 389 gliders, and how do I determine the right capacity?

Peterbilt 389 glider fuel tanks typically come in 100, 120, and 150-gallon capacities. To determine the right size, consider your typical haul distance and weight restrictions. Most long-haul drivers prefer dual 120-gallon tanks (240 gallons total) for extended range, while regional drivers often choose 100-gallon tanks to save weight. Remember that larger tanks add approximately 8 pounds per gallon when full, which affects your payload capacity.

Will these fuel tanks fit my specific year Peterbilt 389 glider, and are there mounting differences?

Our fuel tanks are designed to fit Peterbilt 389 gliders from 2007 through current production years. However, mounting brackets and strap configurations can vary between model years. Pre-2015 models typically use 3-inch wide straps, while 2015 and newer models use 4-inch straps. Always verify your frame rail spacing (typically 34 or 34.5 inches) and existing bracket style before ordering. We recommend checking your OEM-specific specifications or contacting us with your truck details for exact fitment confirmation.

What materials are these tanks made from, and how do aluminum and steel options compare?

We offer both aluminum and steel fuel tanks. Aluminum tanks are lighter (approximately 50% less weight than steel), resist corrosion better, and are standard on most newer 389 gliders. Steel tanks are more affordable and highly durable against impacts but require regular maintenance to prevent rust. Aluminum tanks typically feature 0.125-inch thick walls, while steel tanks use 14-gauge construction. Both meet DOT standards, but aluminum is preferred for weight-sensitive applications.

Can I install these fuel tanks myself, or do I need professional installation?

While experienced mechanics can install these tanks, we recommend professional installation due to safety and regulatory requirements. Installation involves disconnecting fuel lines, electrical connections for sending units, and proper venting system setup. You'll need specialized tools including a transmission jack or tank jack, torque wrenches for bracket specifications (typically 45-50 ft-lbs), and knowledge of DOT fuel system regulations. Improper installation can lead to leaks, gauge malfunctions, or compliance issues during inspections.

Do these tanks come with sending units, straps, and mounting hardware, or are those sold separately?

Most fuel tanks are sold as tank-only units without sending units, straps, or mounting brackets. Sending units must be ordered separately and matched to your specific gauge type (mechanical or electronic). Tank straps and mounting brackets are also separate purchases, as configurations vary by truck setup. We offer complete mounting kits that include straps, brackets, and grade 8 hardware. Always verify what's included in your specific tank listing, as some premium options may include basic mounting hardware.