Peterbilt 330/335/337 Dash Knobs

Frequently Asked Questions About Peterbilt 330/335/337 Dash Knobs

Will these dash knobs fit my specific year model Peterbilt 330, 335, or 337?

Most aftermarket dash knobs for Peterbilt 330/335/337 models are designed to fit trucks manufactured from 2005 through 2015. However, there were minor dashboard changes in 2011 that may affect fitment of certain knobs. We recommend checking your specific dash configuration, particularly around the HVAC controls and auxiliary switches. If you're unsure, contact us with your OEM and we can verify compatibility before ordering.

Are these knobs made of plastic or metal, and how durable are they compared to OEM?

Our dash knobs come in two primary materials: chrome-plated ABS plastic and billet aluminum. The chrome-plated options offer good durability at an economical price point and closely match OEM appearance. Billet aluminum knobs are significantly more durable and resistant to cracking or fading, making them ideal for heavy commercial use. Both options feature standard M6 x 1.0 threading that matches factory specifications.

Do I need any special tools to install these dash knobs, and how difficult is the installation?

Installation is straightforward and typically takes 5-10 minutes per knob. You'll need a small flathead screwdriver to carefully pry off the old knobs and possibly needle-nose pliers for stubborn removals. The new knobs simply push or thread onto the existing control shafts. No dashboard disassembly is required. Be gentle when removing old knobs to avoid damaging the control shafts beneath.

What styles and finishes are available for these dash knobs?

We offer several styles including smooth chrome, knurled chrome, brushed aluminum, and colored anodized aluminum in red, blue, and black. Standard round knobs are most common, but we also carry specialty shapes like skull designs and diamond-cut patterns. Most knobs are sold individually so you can mix and match styles, though complete matching sets are available for a uniform dashboard appearance.

Why are my current dash knobs cracking or falling off, and will replacements have the same problem?

Factory plastic knobs commonly crack due to UV exposure and temperature cycling in the cab. The plastic becomes brittle over time, especially on HVAC controls that see frequent use. Quality aftermarket knobs use UV-resistant materials and improved mounting designs. To maximize lifespan, consider aluminum knobs for high-use controls and use dashboard protectant sprays to reduce sun damage on all interior components.