CSF 3831 Radiator

CSF 3831 Radiator Overview

The CSF 3831 is an OE-style replacement radiator built for select full-size GM trucks and SUVs, including Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Tahoe, GMC Yukon, Cadillac Escalade, Chevrolet Suburban 1500, and Hummer H2 applications. It uses an aluminum core with plastic tanks and a cross-flow layout to match factory-style cooling system packaging.

Part of the CSF Multifit 3728 & 3653 line, this radiator is engineered for broad vehicle coverage while maintaining the fitment and cooling dimensions needed for direct replacement service. The CSF 3831 is designed around a heavy-duty core upgrade for drivers replacing a worn or leaking OE radiator.

Key Features

• Aluminum core with plastic tank construction
• Cross-flow radiator design
• 1-row core with 1 1/4 in. core thickness
• Core dimensions: 34 in. length, 17 1/4 in. width
• Inlet: 1 5/16 in. left; outlet: 1 9/16 in. right
• O.E.M.-style plastic tank and high-efficiency aluminum core with B-tube technology
• Heavy-duty core design with 11% thicker 31 mm construction versus OEM 27 mm
• Oil cooler section: 11 1/2 in. high-efficiency plate type

Product Line Details

CSF manufactures radiators for a wide range of vehicle applications and builds them to high-performance standards using validated cooling designs. The Multifit 3728 & 3653 line is intended to cover multiple GM platforms with a single OE-style radiator configuration, making it a practical choice for service replacement on trucks and SUVs that share the same cooling package.

Detailed Description

The CSF 3831 radiator is built for direct-fit replacement on 2003-2014 Chevrolet Silverado 1500, 2007-2013 GMC Sierra 1500, 2007-2014 GMC Yukon, 2009-2014 Cadillac Escalade, 2007-2014 Chevrolet Suburban 1500, 2008-2010 Chevrolet Silverado 3500, 2008-2009 Chevrolet Tahoe, and 2003-2007 Hummer H2 applications listed in the fitment data. Its OE-style layout, aluminum core, and plastic tanks are matched to factory-style cooling system routing for these GM platforms. This part number, CSF 3831, is built with a high-efficiency core design to support consistent heat transfer in demanding truck and SUV use.

This part cross-references Spectra Premium CU2370 and CU2423 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from aging plastic tanks or core seams
• Reduced cooling performance from a clogged or corroded radiator
• Overheating caused by a damaged or inefficient OE radiator
• Fitment issues when replacing a factory radiator with the correct OE-style dimensions
• Cooling system service needs on high-mileage Chevrolet, GMC, Cadillac, and Hummer vehicles

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet orientation, and oil cooler connection style before installation. This radiator uses a cross-flow configuration with a left-side inlet and right-side outlet, so matching the vehicle’s factory routing is important. Confirm whether the application is listed with or without EOC where noted in the fitment data, especially for 2008-2009 Chevrolet Tahoe applications. The radiator cap is not supplied.

Quality Assurance

CSF states that its factories are ISO/TSO certified and that its radiators are engineered and wind-tunnel tested for cooling performance validation. The brand also notes more than 50 years of radiator production experience and over 30 million units sold worldwide.