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Peterbilt 389 Frame Steps & Acc.
Frequently Asked Questions About Peterbilt 389 Frame Steps & Acc.
What material are these frame steps made from, and will they rust or corrode?
Most Peterbilt 389 frame steps are constructed from either polished stainless steel or aluminum. Stainless steel options offer superior corrosion resistance and maintain their shine with minimal maintenance. Aluminum steps are lightweight and naturally resist rust, though they may show wear over time. Both materials are designed to withstand road salt, weather, and heavy use. For maximum durability in harsh conditions, we recommend 304-grade stainless steel steps.
Will these frame steps fit my specific year and model Peterbilt 389?
Frame steps for the Peterbilt 389 typically fit model years 2008 through current production. However, variations exist based on cab configuration (day cab vs. sleeper), exhaust setup, and whether you have extended or standard frame rails. Most universal-fit steps work with standard 10.25-inch frame rails. Before ordering, check your frame rail width and measure the mounting area to ensure proper clearance from exhaust components and fuel tanks.
How difficult is the installation, and what tools do I need?
Installation typically takes 1-2 hours per side for someone with basic mechanical skills. You'll need a drill with metal bits (usually 3/8-inch), a socket set, and possibly a rivet gun depending on the mounting style. Most frame steps come with mounting brackets and hardware, but some require drilling new holes in your frame rails. Many drivers recommend using anti-seize compound on all bolts to prevent corrosion and make future removal easier.
What's the difference between cab-mount and frame-mount steps?
Cab-mount steps attach directly to the cab structure and move with the cab suspension, reducing stress on mounting points. Frame-mount steps bolt to the frame rails and remain stationary. Frame-mount options typically offer more stability and weight capacity (usually 500+ pounds), while cab-mount steps may have less vibration. Your choice depends on mounting point availability and whether you frequently need to access areas behind the cab.
Do these steps come in different finishes, and which holds up best?
Common finishes include mirror-polished stainless, brushed stainless, chrome-plated steel, and powder-coated options. Mirror-polished stainless maintains its appearance longest with regular cleaning but shows fingerprints easily. Brushed finishes hide minor scratches better and require less frequent polishing. Chrome looks exceptional when new but may peel or rust if the base metal is exposed through chips. For the best long-term appearance with minimal maintenance, brushed stainless steel is the most practical choice.