2020 Peterbilt 579 Wiper Blade Sizes

Quick reference

Best aftermarket replacements

• Bosch ICON: Premium beam blade, excellent all-weather performance. (Higher price tier)
• Rain-X Latitude: Beam blade, good performance with water repellent coating. (Mid-higher price tier)
• Trico Force: Beam blade, durable and strong, good for harsh conditions. (Mid price tier)
• Michelin Stealth: Hybrid blade, combination of traditional and beam for all-season performance. (Mid price tier)
• PIAA Si-Tech: Silicone blade, long-lasting and quiet operation. (Higher price tier)

Attachment style

The 2020 Peterbilt 579 typically uses a J-hook style attachment for its wiper blades. This is one of the most common attachment styles and is relatively easy to work with. If your truck has a different attachment, consult your owner's manual or a local parts specialist to ensure you get the correct replacement.

How to install

Replacing wiper blades on your Peterbilt 579 is a straightforward process:

1. Lift the wiper arm: Gently pull the wiper arm away from the windshield until it locks in the upright position. Be careful not to let it snap back against the glass.
2. Remove the old blade: Look for a small tab or button on the underside of the wiper blade where it connects to the arm. Press or lift this tab and slide the old blade off the J-hook. It might require a little wiggling.
3. Attach the new blade: Slide the new wiper blade onto the J-hook. You should hear a click or feel it lock into place. Give it a gentle tug to ensure it's securely fastened.
4. Lower the wiper arm: Carefully lower the wiper arm back onto the windshield. Repeat the process for the other side.

Note: While the J-hook is standard on many vehicles, always double-check the attachment style of your new blades and refer to any instructions provided by the manufacturer, especially if you have an unusual attachment design.

When to replace

Wiper blades are crucial for safe driving, especially in adverse weather conditions. It's generally recommended to replace them every 6 to 12 months, or at the first signs of wear. Here are common indicators that your wiper blades need replacing:

• Streaking: If your wipers leave lines or streaks on the windshield, the rubber is likely worn or cracked.
• Chattering or skipping: Wipers that bounce or skip across the windshield instead of smoothly gliding are not making proper contact.
• Squeaking or squealing: Unusual noises during operation can indicate worn rubber or improper blade angle.
• Visible damage: Inspect the rubber element for cracks, tears, or hardening.

Don't wait until a severe downpour to realize your wipers aren't performing optimally. Regular inspection and timely replacement will ensure clear visibility and enhance your driving safety.

Need wipers swapped fast? Find a shop on Repairius.