Peterbilt 567/579 Dash Knobs

Frequently Asked Questions About Peterbilt 567/579 Dash Knobs

What are dash knobs used for on the Peterbilt 567 and 579?

Dash knobs are the control knobs used to operate functions on the dashboard, such as headlight switches, dimmer controls, HVAC vents, wiper controls, and other panel-mounted switches. They are a small but frequently handled part of the cab interior, so wear and breakage over time is common.

Will these knobs fit both the Peterbilt 567 and 579 models?

Most knobs listed in this category are designed to fit both the 567 and 579 dash layouts, since these models share similar dash configurations. However, knob shaft size, shape, and the function they control can vary between switch types, so it's important to check the product description and compare it to your existing knob or the switch it will attach to before ordering.

What materials and finishes are available for these dash knobs?

Dash knobs are typically available in chrome, billet aluminum, and durable plastic or composite options. Some finishes are designed to closely match factory OEM knobs, while others offer a more custom or upgraded appearance. Choosing a finish that matches the rest of your dash trim will give the most consistent look.

How do I install a replacement dash knob?

Most dash knobs are a simple push-on or twist-on fit over an existing switch shaft, and many use a set screw or friction fit to stay secure. In most cases, no tools are needed beyond possibly a small screwdriver or hex key for knobs with a locking screw. Always remove the old knob carefully to avoid damaging the underlying switch stem, and confirm the knob's fit before applying pressure.

Can I use these knobs to upgrade the look of my interior, not just replace a broken one?

Yes, many customers purchase dash knobs to refresh or customize the look of their cab, not only to replace cracked or worn originals. Upgrading to chrome or billet knobs is a common, affordable way to add a custom touch to the dashboard without altering the underlying switches or wiring.