CSF 3900 Radiator

CSF 3900 Radiator for GM Trucks and SUVs

The CSF 3900 radiator is an OE-style replacement built with an aluminum core and plastic tanks for direct-fit cooling performance. It is engineered for select Chevrolet Silverado 1500, GMC Sierra 1500, Tahoe, Yukon, Yukon XL, Cadillac Escalade, and Escalade ESV applications from 2019-2026.

Key Features

• Aluminum core with plastic tank construction
• Cross-flow radiator design
• 1-row core configuration
• Core thickness: 1 1/4 in.
• Inlet diameter: 1 5/16 in. left
• Outlet diameter: 1 9/16 in. right
• OE-style plastic tank and aluminum core layout
• Wind tunnel tested for cooling performance validation

Detailed Description

CSF part number 3900 is designed as a direct OE-style radiator replacement for late-model GM full-size trucks and SUVs. The cross-flow layout, aluminum core, and plastic tank design follow the factory-style configuration while using a 31 mm CSF core specification versus the OE 28 mm setup noted in the fitment data. This radiator is built for vehicles including the Chevrolet Silverado 1500 and GMC Sierra 1500, along with Tahoe, Yukon, Yukon XL, Escalade, and Escalade ESV applications.

CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory testing. The brand also notes ISO/TSO-certified factories and broad global production experience across many radiator models. This part cross-references GM3010618 and 84501973 for the same application.

What This Radiator Helps Address

• Overheating caused by a restricted or aging radiator core
• Coolant leaks from cracked or deteriorated plastic tanks
• Reduced heat rejection from a damaged factory radiator
• Cooling system performance loss after mileage, corrosion, or impact damage
• Fitment issues when replacing the original radiator on GM Silverado 1500, Sierra 1500, Tahoe, Yukon, or Escalade models

Installation Notes and Tips

Verify inlet and outlet orientation before installation: inlet is on the left and outlet is on the right. This radiator does not include a cap. Confirm OE-style dimensions and cooling line routing against the original unit before installation on 2019-2026 Chevrolet Silverado 1500, GMC Sierra 1500, and related GM SUV applications.

Quality Assurance

CSF radiators are manufactured to controlled standards and tested for cooling performance validation. Part number 3900 is built for consistent OE-style fitment and dependable thermal management in select GM truck and SUV applications.