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CSF 3866 Radiator
| Brand | CSF 3866 |
|---|---|
| Core Thickness | 7/8 |
| Core Width | 21 11/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 26 13/16 |
| Inlet Diameter | 1 3/16 left |
| Outlet Diameter | 1 3/16 right |
| Down Flow Or Cross Flow Type | Cross flow |
| Radiator Core Row Quantity | 1 |
| Cap Included | No |
| Box Height (in) | 6 1/16 |
| Box Length (in) | 36 3/8 |
| Box Weight (lbs) | 13 |
| Box Width (in) | 27 5/16 |
| Hazardous Material | No |
| Inlet Length (in) | 22 1/16 |
| Inlet Width (in) | 1 5/8 |
| Oil Cooler (in) | No |
| Outlet Length (in) | 22 1/16 |
| Outlet Width (in) | 1 5/8 |
| Tech Note | O.e.m. style plastic tank & aluminum core. |
| Fits | Chevrolet and GMC · 24 vehicles |
OE-style design. Plastic tank and aluminum core construction matches the original layout.
Cross-flow radiator. Engineered for efficient coolant flow through a single-row core.
No cap included.
Cross-references Carlson 13682, Dorman - HELP 13691 and Partslink Numbering System GM3010606 for the same application. See all 6.
Radiator for Chevrolet Equinox and GMC Terrain
Restore cooling performance with the CSF 3866 radiator, built as an OEM-style replacement with a plastic tank and aluminum core. This cross flow radiator is engineered for 2018-2026 Chevrolet Equinox and 2018-2026 GMC Terrain applications, with left-side inlet and right-side outlet connections for direct-fit service.
Key Features
- OEM-style plastic tank and aluminum core construction
- Cross flow design for the listed Chevrolet Equinox and GMC Terrain applications
- Core thickness: 7/8 in.
- Core dimensions: 26 13/16 in. length x 21 11/16 in. width
- Inlet diameter: 1 3/16 in., left side
- Outlet diameter: 1 3/16 in., right side
- Single-row radiator core
- No cap included
Detailed Description
The CSF 3866 radiator is a direct replacement radiator for 2018-2026 Chevrolet Equinox and 2018-2026 GMC Terrain models. It uses an aluminum core with plastic tanks in an OEM-style layout, matching the cross flow configuration and hose connection placement needed for proper cooling system service. The CSF 3866 is a practical choice when replacing a leaking, damaged, or restricted radiator on these GM crossover applications. This part cross-references Carlson 13682 and Dorman - HELP 13691 for the same application.
What This Radiator Helps Address
- Coolant leaks from cracked tanks or aged seams
- Overheating caused by reduced radiator efficiency
- Restricted coolant flow from internal buildup or corrosion
- Physical damage to the radiator core or end tanks
- Cooling system service on a Chevrolet Equinox or GMC Terrain
Installation Notes and Tips
Verify inlet and outlet orientation before installation: this radiator uses a left inlet and right outlet layout. Confirm core dimensions, hose routing, and mounting points against the original unit before transfer. The radiator cap is not included, so reuse or replace the cap as needed based on the vehicle’s cooling system specification.
Quality Assurance
CSF manufactures this radiator to OEM-style specifications for the listed fitments, using an aluminum core and plastic tank construction that follows the original configuration for the Chevrolet Equinox and GMC Terrain platform. Part number 3866 is also listed under Partslink number GM3010606.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2026 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2026 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2025 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2025 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2024 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2024 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2023 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2023 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2022 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2022 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2021 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2021 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2020 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2020 | Chevrolet | Equinox | 2.0L | L4 | N/A | — |
| 2020 | GMC | Terrain | 2.0L | L4 | N/A | — |
| 2020 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2019 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2019 | Chevrolet | Equinox | 2.0L | L4 | N/A | — |
| 2019 | GMC | Terrain | 1.5L | L4 | N/A | — |
| 2019 | GMC | Terrain | 2.0L | L4 | N/A | — |
| 2018 | Chevrolet | Equinox | 1.5L | L4 | N/A | — |
| 2018 | Chevrolet | Equinox | 2.0L | L4 | N/A | — |
| 2018 | GMC | Terrain | 2.0L | L4 | N/A | — |
| 2018 | GMC | Terrain | 1.5L | L4 | N/A | — |
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