2015 Peterbilt 579 Wiper Blade Sizes

Quick Reference: 2015 Peterbilt 579 Wiper Blade Specs

Best Aftermarket Replacements

For the 2015 Peterbilt 579, which uses a common 22-inch J-hook blade on both sides, you have a wide variety of excellent aftermarket choices. These beam-style blades offer the best performance and durability, especially for the large, flat windshield of a Class 8 truck.

• Good: Michelin Stealth Ultra or Rain-X Latitude. These are great value blades, offering excellent all-season performance and a durable design at an affordable price point, typically $20-$25 per blade.
• Better: Trico Force or Bosch ICON. These blades represent a step up, engineered for higher wiping pressure and better performance at highway speeds. Expect to pay in the $25-$30 range per blade.
• Best: PIAA Si-Tech. For drivers who demand the absolute best visibility in all conditions, PIAA's silicone blades are the top-tier choice. They are the most expensive, often $30+ per blade, but they last significantly longer and apply a water-repellent barrier to the windshield as they wipe.

Attachment Style

The 2015 Peterbilt 579 uses a standard 9x3mm J-Hook attachment on both the driver and passenger side wiper arms. This is the most common type of wiper arm, making replacements easy to find at any truck stop or parts store.

How to Install

Changing wiper blades on a 579 is straightforward and requires no tools.

1. Lift the Wiper Arm: Gently lift the entire wiper arm away from the windshield until it locks in the service position.
2. Release the Old Blade: Locate the small tab on the underside of the connector where the blade attaches to the J-hook. Press this tab in and slide the old wiper blade down and off the hook.
3. Install the New Blade: Make sure your new blade's connector is oriented correctly. Slide the J-hook of the wiper arm into the connector until you hear a distinct "click."
4. Lower the Arm: Gently lower the wiper arm back onto the windshield.
5. Test: Run your wipers with washer fluid to ensure they are seated correctly and clear the glass effectively.

When to Replace

Wiper blades are a critical safety item. For a commercial truck driver, clear visibility is paramount. Plan to replace your wipers every 6 to 12 months as part of your routine maintenance schedule.

Replace them immediately if you notice:

• Streaking: Leaving lines or unwiped sections on the glass.
• Chattering: The blade skipping or vibrating across the windshield.
• Squeaking: Loud or excessive noise during operation.
• Cracking: Visible damage, splits, or rot on the rubber squeegee.

Need wipers swapped fast? Find a shop on Repairius.