Frequently Asked Questions About Peterbilt 387 Frame Steps & Acc.

Will these frame steps fit my specific year Peterbilt 387?

Most aftermarket frame steps are designed to fit Peterbilt 387 models from 1999-2010. However, there can be variations based on your truck's configuration, especially if you have an extended hood or custom exhaust setup. We recommend checking the product specifications for each item or contacting our customer service team with your VIN to ensure proper fitment. Steps designed for the 387 typically use the existing frame mounting holes, but some model years may require minor modifications.

What's the difference between aluminum and stainless steel frame steps?

Aluminum steps are lightweight (typically 8-12 lbs per set) and resist corrosion well, making them ideal for weight-conscious drivers. They're usually less expensive but may show scratches more easily. Stainless steel steps are heavier (15-20 lbs per set) but offer superior durability and maintain their appearance longer, especially in harsh weather conditions. Both materials provide adequate strength for daily use, supporting 300-500 lbs depending on the design. Your choice often comes down to budget, aesthetic preference, and whether weight is a critical factor for your operation.

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

Installation typically takes 1-2 hours and requires basic hand tools: a socket set (usually 3/4" and 7/8"), wrenches, and possibly a drill with metal bits if new holes are needed. Most frame steps use existing frame mounting points with U-bolts or bracket systems. The main challenges drivers report are accessing tight spaces behind the fuel tanks and aligning brackets properly. Having a second person helps significantly. Some installations may require removing the fuel tank step for better access. We provide installation instructions with each product, and many customers successfully complete this as a DIY project.

What styles and finishes are available for the 387?

Frame steps for the Peterbilt 387 come in several popular styles: standard flat steps, diamond plate pattern, louvered (with drainage slots), and ribbed designs. Finish options include polished aluminum, brushed stainless steel, powder-coated black, and chrome-plated steel. The most popular choice is polished aluminum diamond plate for its balance of appearance, traction, and value. Extended steps that provide easier cab access are available for trucks with larger fuel tanks or modified suspensions. Width options typically range from 6" to 10", with 8" being the most common size.

How do I maintain frame steps to prevent rust and corrosion?

Maintenance requirements vary by material. Aluminum steps need occasional cleaning with soap and water, plus aluminum polish to maintain shine. Avoid using steel wool or harsh chemicals that can scratch the surface. Stainless steel steps are more forgiving but benefit from periodic cleaning with stainless steel cleaner to remove road grime and prevent pitting. For any steel components or mounting hardware, apply anti-seize compound during installation and inspect regularly for rust. In winter climates, rinse steps frequently to remove road salt. Most quality steps will last 5-10 years with proper care, with stainless steel options often exceeding this timeframe.