Peterbilt 379 Dash Knobs

Frequently Asked Questions About Peterbilt 379 Dash Knobs

What are Peterbilt 379 dash knobs used for?

These knobs are the control handles for various dash-mounted functions inside the Peterbilt 379, such as headlights, dimmer switches, heater and A/C controls, wiper controls, and other panel-mounted switches. They are typically the part you grip and turn or pull to operate these systems, and they often wear out, crack, or lose their finish over time from regular use and sun exposure.

Will these knobs fit my specific Peterbilt 379 model year?

Dash knob designs can vary somewhat depending on the model year and dash configuration of your Peterbilt 379, so it is important to compare the thread size, shaft type, and overall shape of your existing knob to the replacement listing before ordering. If you are unsure, checking the part number on your current knob or reaching out to our team with photos of your dash setup can help confirm a proper match.

What materials and finishes are these knobs available in?

Peterbilt 379 dash knobs are commonly offered in materials like chrome-plated metal, durable plastic, or wood grain finishes to match different interior styles. Chrome and metal options tend to hold up well to daily handling, while wood grain and painted finishes are chosen more for matching a customized dash look. Consider how the knob will be used and how much wear it will see before choosing a finish purely for appearance.

How do I install a replacement dash knob?

Most dash knobs simply pull off or unscrew from the control shaft they are mounted on, and the new knob is pressed on or threaded into place by hand. No special tools are typically required, but it is a good idea to note how the original knob was oriented and secured before removing it, especially if there is a set screw or locking tab involved.

Why does my dash knob feel loose or spin without engaging the control?

A knob that spins freely or feels loose is usually a sign that the internal fitting has worn down, the set screw has loosened, or the knob was not seated fully onto the shaft. Before replacing the knob, check that it is pushed on completely and that any retaining screw is snug, since sometimes the fix is as simple as reseating or tightening the existing knob rather than installing a new one.