2016 Peterbilt 389 Wiper Blade Sizes & Replacement Guide

The 2016 Peterbilt 389 is an absolute icon of the American highway, built for long hauls, heavy loads, and serious durability. But when you are driving hundreds of miles through driving rain or snow, having a clear view out of that classic flat split-windshield is critical for your safety and the safety of everyone else on the road. Finding the right wiper blades for a commercial heavy-duty truck can sometimes be confusing, but as a parts counter expert, I’m here to clear things up.

Below is your complete guide to the 2016 Peterbilt 389 wiper blade sizes, attachments, and replacement options.

Quick reference

For the 2016 Peterbilt 389, both the driver and passenger sides use the exact same size blade. Being a conventional heavy-duty cab, there is no rear wiper equipped.

(Note: Depending on your specific arm spec, some 389s can accept up to 18-inch blades, but 16-inch is the standard factory length. Always verify your current blade length before purchasing. OEM part numbers vary based on factory trim; consult your Peterbilt dealer for exact original equipment numbers.)

Best aftermarket replacements

While you can always grab heavy-duty commercial blades from a truck stop, many drivers prefer upgrading to premium aftermarket automotive and light-truck blades that fit standard heavy-duty hook/saddle adapters. Here are the top choices:

• Bosch ICON: (Premium Price) Excellent beam-style blade that resists wind lift at highway speeds. Great for avoiding snow buildup.
• Rain-X Latitude: (Premium Price) Water-repelling beam blade that treats your windshield as it wipes.
• Trico Force: (Mid-to-High Price) A robust high-wind beam blade with a swept-wing spoiler, ideal for aerodynamic drag on heavy trucks.
• Michelin Stealth: (Mid-Tier Price) A hybrid blade combining the durability of a conventional frame with a protective cover.
• PIAA Si-Tech: (Premium Price) Silicone wiper blades that last incredibly long and withstand extreme temperatures and UV exposure.

Attachment style

Heavy-duty trucks like the Peterbilt 389 typically utilize a heavy-duty saddle or large J-hook attachment. Upgraded aftermarket blades come with multi-adapters in the box. You will want to select the wide saddle or large J-hook adapter piece provided in the package to securely snap onto your truck's thick wiper arms.

How to install

Installing new wipers on your 389 is straightforward, though reaching them might require using the cab steps!

1. Pull the wiper arm away from the windshield until it locks in the upright position.
2. Depending on your current blade, press the release tab on the saddle or hook attachment.
3. Slide the old blade down toward the base of the wiper arm to disengage it from the hook or saddle pin.
4. Snap the appropriate heavy-duty adapter onto your new blade (if required).
5. Slide the new blade onto the wiper arm hook until you hear a firm click.
6. Gently lower the wiper arm back onto the windshield.

When to replace

For over-the-road trucks logging heavy miles, wiper blades wear out faster than they do on standard passenger cars. You should generally replace your wiper blades every 6 to 12 months. However, you should swap them out immediately if you notice:

• Streaking: Leaving bands of water right in your line of sight.
• Chattering: The blade skips or bounces across the glass, usually due to hardened or sun-baked rubber.
• Splitting: The rubber squeegee is physically tearing away from the frame.

Need wipers swapped fast? Find a shop on Repairius.