Peterbilt 375/377 Dash Knobs

Frequently Asked Questions About Peterbilt 375/377 Dash Knobs

What are Peterbilt 375/377 dash knobs used for?

Dash knobs are the control handles mounted on your dashboard that operate switches, valves, and levers inside the cab, such as headlight switches, heater and defroster controls, wiper switches, and dash-mounted valve controls. They are the small components you physically grip and turn or pull to control various cab functions.

Will these dash knobs fit my specific Peterbilt 375 or 377 model year?

Dash knob fitment can vary depending on the exact cab configuration, control type, and model year of your truck. Before purchasing, check the shaft size, thread pattern, and knob style against your existing knob or the control it attaches to. If you are unsure, comparing measurements or contacting our support team with your VIN or truck details can help confirm the correct match.

What materials and finishes are available for these dash knobs?

Dash knobs are commonly offered in materials such as chrome-plated plastic, aluminum, or durable molded plastic, depending on the specific knob and its application. Finish options often include chrome, brushed metal, or black, allowing you to match or upgrade the look of your existing dash hardware.

How do I install a replacement dash knob?

Most dash knobs are designed for simple installation. Typically, this involves removing the old knob by unscrewing it, pulling it off a splined shaft, or releasing a small retaining clip or screw, then pressing or threading the new knob into place. Always confirm the attachment method for your particular knob before starting, since some use a friction fit while others require a screw or clip.

Why is my dash knob loose, cracked, or not gripping the shaft properly?

Over time, knobs can become loose or damaged due to age, UV exposure, temperature changes, or repeated use, which causes plastic to become brittle or the internal grip mechanism to wear down. If a knob no longer stays secured on its shaft or has visible cracks, replacing it with a properly sized new knob is the most reliable fix rather than trying to repair the worn part.