CSF 3975 Radiator

CSF 3975 Radiator for Heavy-Duty GM Trucks

CSF 3975 is an OE-style radiator built for select 2020-2026 Chevrolet Silverado 2500 HD and Silverado 3500 HD, plus GMC Sierra 2500 HD and Sierra 3500 HD applications. It uses an aluminum core with plastic tanks and a cross-flow layout to match the factory-style cooling package while adding a heavier-duty core design for these trucks.

• Aluminum core with plastic tank construction
• Cross-flow radiator design
• 1-row core with 1 1/4 in. thickness
• Core dimensions: 37 9/16 in. length, 23 3/8 in. width
• Inlet: 1 5/16 in. left; outlet: 1 1/2 in. right
• Integrated high-efficiency plate-type oil cooler, left and right
• Quick-connect outlet pipe and quick-connect oil cooler fittings
• Radiator cap not supplied

Detailed Product Overview

Built by CSF, part number 3975 is engineered and wind-tunnel tested for cooling performance validation, with manufacturing backed by ISO/TSO-certified facilities. This radiator is designed around the factory-style plastic tank and aluminum core layout, while the upgraded heavy-duty core specification is listed for 2020-2026 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD trucks. This part cross-references BBB Industries 13885 for the same application.

Common Cooling Issues Addressed

• Cracked or leaking radiator tanks
• Restricted coolant flow from an aging core
• Transmission or engine cooling concerns tied to radiator wear
• Damaged quick-connect fittings or outlet pipe connections
• Cooling system service needs on heavy-duty Silverado and Sierra trucks

Installation Notes and Tips

Verify inlet and outlet orientation before installation: inlet is on the left and outlet is on the right. Confirm the vehicle uses the listed quick-connect outlet pipe and oil cooler fittings, and compare core dimensions and hose connections against the original radiator before removal. The radiator cap is not included, so reuse or replace the cap separately as needed.

Quality Assurance

CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory testing. With more than 10,000 radiator models produced and over 30 million units sold worldwide, CSF 3975 reflects the brand’s long-running focus on OE-style fit and cooling-system consistency.