Frequently Asked Questions About Peterbilt 389 Fuel Tank Steps

What material are these fuel tank steps made from, and will they rust or corrode?

Most Peterbilt 389 fuel tank steps are manufactured from either polished stainless steel or aluminum. Stainless steel options provide excellent corrosion resistance and maintain their shine with minimal maintenance. Aluminum steps are lightweight and naturally resist corrosion but may show oxidation over time if not properly maintained. Both materials are designed to withstand road salt, weather exposure, and diesel fuel contact. For maximum durability in harsh climates, we recommend stainless steel with a mirror polish finish.

Will these steps fit my specific year Peterbilt 389, and what about aftermarket fuel tanks?

Our fuel tank steps are designed to fit Peterbilt 389 models from 2008 through current production years. However, fitment can vary based on your fuel tank configuration. Standard 26-inch diameter round tanks and D-shaped tanks typically use the same step mounting patterns. If you have aftermarket fuel tanks or custom tank straps, you may need to verify the mounting hole spacing, which is typically 13-14 inches on center. We recommend checking your existing step brackets or contacting us with your VIN for exact fitment confirmation.

How difficult is the installation, and what tools will I need?

Installation typically takes 30-45 minutes per side for someone with basic mechanical skills. You'll need a socket set (usually 9/16" and 5/8"), potentially a drill with metal bits if new holes are required, and anti-seize compound for the hardware. Most steps bolt directly to existing mounting points on your fuel tank straps. The main challenge customers report is accessing the back bolts on certain tank configurations. Having a ratcheting wrench or offset wrench helps significantly. Professional installation usually runs $50-100 per side if you prefer not to do it yourself.

What styles and finishes are available, and which hold up best?

Common styles include diamond plate, smooth plate, and punched hole designs. Finishes range from mirror polish to brushed stainless and powder-coated options. Mirror polish provides the showiest appearance but requires more frequent cleaning to maintain. Brushed finishes hide minor scratches better and are easier to maintain. Diamond plate offers the best traction but can trap dirt. For working trucks, we typically recommend brushed stainless diamond plate. For show trucks, mirror polish smooth steps create the cleanest look.

How much weight can these steps support, and will they bend under heavy use?

Quality fuel tank steps are typically rated for 300-500 pounds of static weight, depending on the manufacturer and material thickness. Steps made from 14-gauge or thicker material provide the best support for daily climbing. The mounting brackets are usually the limiting factor rather than the step itself. Customers who frequently carry tools or equipment while climbing should look for reinforced brackets and consider steps with additional support gussets. Avoid steps thinner than 16-gauge if you're over 250 pounds or frequently climb with gear.