Peterbilt 386 Dash Knobs

Frequently Asked Questions About Peterbilt 386 Dash Knobs

What are dash knobs used for on the Peterbilt 386?

Dash knobs are the control knobs used to operate functions such as headlights, panel lights, heater and A/C controls, wiper switches, and other dash-mounted controls in the cab. They are often the small detail that wears out, cracks, or goes missing over time, and replacing them restores both function and appearance to your dash.

Will these knobs fit my Peterbilt 386 without modification?

Most dash knobs listed in this category are designed to match the factory stem sizes and thread patterns used in the Peterbilt 386, so they typically thread or press on without needing to modify your dash. That said, Peterbilt made changes across production years, so it is a good idea to check the knob's shaft type, thread size, or mounting style against your existing knob before ordering, especially if you are replacing just one or two knobs to match the rest of your dash.

What materials and finishes are these knobs available in?

Dash knobs in this category are commonly offered in chrome-plated plastic or metal, as well as colored or textured plastic options. Chrome finishes give a polished look that matches other chrome dash accents, while textured or rubberized options can offer a better grip. Choosing a finish often comes down to matching the rest of your interior or personal preference.

How do I install a replacement dash knob?

Installation is generally straightforward. Most knobs simply pull off or unscrew from the control stem, and the new knob is pressed on or threaded into place by hand. No special tools are usually required, though a small amount of patience may be needed if the old knob is stuck or brittle from age. If a knob is attached with a small retaining screw or clip, be sure to remove that first before pulling the knob off the stem.

Can I buy dash knobs individually or only as a set?

Both options are typically available. If you only need to replace one cracked or missing knob, you can usually order a single knob to match your existing set. If your entire dash is showing wear, buying a full set at once helps ensure consistent color, finish, and style across all your controls.