CSF 3956 Radiator

CSF 3956 Radiator for Encore GX and Trailblazer

The CSF 3956 radiator is an OE-style replacement built with a plastic tank and aluminum core for direct-fit cooling service. It is engineered as an upgraded heavy-duty core with a 10% thicker 22mm design versus the OEM 20mm specification, making it a strong choice for drivers needing dependable cooling performance in the Buick Encore GX and Chevrolet Trailblazer.

Key Features

• OE-style plastic tank and aluminum core construction
• Cross flow radiator design
• Single-row core layout
• Core thickness: 7/8 in.
• Core dimensions: 26 3/4 in. length x 14 5/8 in. width
• 1 5/16 in. left inlet and 1 5/16 in. right outlet
• Upgraded heavy-duty core, 10% thicker than OEM 20mm
• CSF part number 3956

Detailed Description

CSF designs and manufactures radiators for a wide range of vehicle applications, with engineering focused on cooling performance validation. Part number 3956 uses an aluminum core with plastic tanks in a cross flow configuration, matching the OE-style layout expected for modern compact SUVs. The radiator’s 1 5/16 in. inlet and outlet sizing, along with its single-row construction, supports direct replacement service for 2020-2026 Buick Encore GX and 2021-2026 Chevrolet Trailblazer models. This CSF 3956 radiator is built for owners looking for a replacement that follows factory-style dimensions while adding a thicker heavy-duty core.

This part cross-references FEL-PRO 13877 for the same application.

What It Helps Address

• Coolant temperature rise from a worn or restricted radiator
• Leaks caused by aging plastic tank and core assemblies
• Reduced heat transfer from a damaged or corroded core
• Cooling system service needs after radiator failure
• Factory replacement requirements for Encore GX and Trailblazer cooling systems

Installation Notes and Tips

Verify inlet and outlet orientation before installation, since this radiator uses a left inlet and right outlet layout. Confirm fitment by year, make, and model before ordering, especially for 2020-2026 Buick Encore GX and 2021-2026 Chevrolet Trailblazer applications. Inspect hoses, clamps, and coolant condition during radiator replacement to help complete the cooling system service correctly. 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. Part number 3956 is manufactured to support OE-style fitment and heavy-duty cooling requirements for the listed vehicle applications.