Kenworth T680 Peterbilt 579 Radiator (2022-2026) - Next Gen Heavy Duty - Replaces PY091001

• Direct OEM Match: Precision-engineered to directly replace PACCAR OEM number PY091001 and 770057 for a seamless, drop-in installation.
• Maximum Heat Dissipation: Features a massive 42-15/16" x 33-15/16" high-efficiency aluminum core to keep your 2022+ Kenworth or Peterbilt running cool.
• 1-Year Warranty: Backed by a comprehensive 1-year warranty, giving owner-operators and fleet managers total peace of mind.
• OE-Style Construction: Built with reinforced plastic tanks and a heavy-duty aluminum core, perfectly matching the factory design for optimal thermal expansion and pressure resistance.
• Leak-Free Connections: Precision-machined 2-1/2" inlet and outlet necks ensure a perfect, secure seal with your factory cooling hoses.

Ensure your "Next Gen" PACCAR aerodynamic truck stays cool under pressure with this premium Kenworth T680 Peterbilt 579 Radiator by FleetPro Parts & Tires. Specifically engineered for the 2022–2026 generation of trucks, this heavy-duty unit is the professional’s choice for maintaining optimal engine efficiency. Designed to meet the intense thermal demands of modern high-torque diesel engines, this radiator provides the reliable cooling required for long-haul and regional routes. We stock these units heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for owner-operators and fleets across the Midwest and nationwide.

Advanced Cooling for Modern Fleets: The Kenworth T680 Peterbilt 579 Radiator Advantage

This Kenworth T680 Peterbilt 579 Radiator is built with reinforced plastic tanks bonded to a high-capacity aluminum core to withstand the high-pressure environments of modern trucking. It serves as a premium replacement for major OEM part numbers including PY091001 and 770057. Note: Its precision-engineered 42-15/16" x 33-15/16" core ensures maximum airflow and heat transfer, while the 2-1/2" inlet and outlet connections guarantee a secure, leak-proof seal with your factory hoses during the demanding 2026 haul season.

At FleetPro, we specialize in high-quality PACCAR cooling components that offer a superior alternative to expensive dealer parts without sacrificing durability. This unit provides excellent resistance to vibration-related stress and thermal expansion, preventing the hairline cracks common in standard cores. Don't let a coolant leak sideline your business; choose a radiator specifically optimized for the newest Kenworth and Peterbilt cooling packages and experience professional-grade reliability for the long haul.

Vehicle Fitment & Compatibility

This radiator is a guaranteed fit for the following 2022-Current applications (Must match OEM number):

• Kenworth T680: 2022, 2023, 2024, 2025, 2026
• Peterbilt 579: 2022, 2023, 2024, 2025, 2026
• Note: Specifically for "Next Gen" Aerodynamic body styles.

Direct Replacement & Cross-Reference Numbers:

This radiator serves as a direct exact-fit replacement for the following part numbers:

• PACCAR OEM: PY091001
• Industry Cross-Reference: 770057PT, 770057

Technical Specifications

• Core Dimensions: 42-15/16" Height x 33-15/16" Width
• Core Depth: 1-5/8" (High-Efficiency Single Row)
• Inlet / Outlet Neck: 2.5" / 2.5"
• Construction: OE Style - Reinforced Plastic Tanks / Aluminum Core
• Warranty: 1-Year Limited Warranty
• Brand: FleetPro Parts & Tires