/live/media/C3/C3_3901_Fro.jpg)
CSF 3901 Radiator
| Brand | CSF 3901 |
|---|---|
| Core Thickness | 7/8 |
| Core Width | 19 3/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 34 15/16 |
| Inlet Diameter | 1 5/16 left |
| Outlet Diameter | 1 9/16 right |
| Down Flow Or Cross Flow Type | Cross flow |
| Radiator Core Row Quantity | 1 |
| Cap Included | No |
| Box Height (in) | 6 1/4 |
| Box Length (in) | 44 7/16 |
| Box Weight (lbs) | 18 |
| Box Width (in) | 25 1/8 |
| Hazardous Material | No |
| Inlet Length (in) | 19- 15/16 |
| Inlet Width (in) | 1 9/16 |
| Oil Cooler (in) | 11 1/2 left & right (high-effeciency plate type) |
| Outlet Length (in) | 19 15/16 |
| Outlet Width (in) | 2 7/16 |
| Tech Note | O.e.m. style plastic tanks & aluminum core with quick-connect oil |
| Fits | Chevrolet and GMC · 6 vehicles |
OE-style construction. Plastic tanks and an aluminum core match the original design.
Cross-flow design. Helps promote efficient coolant flow through the radiator.
Quick-connect fittings. Makes oil cooler connections faster and cleaner to install.
Cross-references OSC 13841, 23388805 and GM3010619 for the same application. See all 3.
CSF 3901 Radiator for Silverado and Sierra
The CSF 3901 radiator is built for 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500 applications with OE-style plastic tanks and an aluminum core. It is engineered for direct replacement fitment and consistent cooling performance in cross-flow configurations.
Key Features
- Aluminum core with plastic tanks for OE-style construction
- Cross-flow design with 1-row core layout
- Core thickness: 7/8 in.
- Core dimensions: 19 3/16 in. wide x 34 15/16 in. long
- Inlet diameter: 1 5/16 in. left
- Outlet diameter: 1 9/16 in. right
- Quick-connect oil cooler fittings with high-efficiency plate-type oil cooler
- Designed and wind tunnel tested for cooling performance validation
- Part number: 3901
Detailed Description
CSF 3901 is a radiator assembly for the Chevrolet Silverado 1500 and GMC Sierra 1500, covering 2019-2021 model years listed in the fitment data. It uses an aluminum core with OEM-style plastic tanks and quick-connect oil cooler fittings, matching the layout expected in modern truck cooling systems. The cross-flow design and plate-type oil cooler support stable heat transfer in demanding driving conditions. CSF manufactures radiators to high-performance standards and validates designs through laboratory wind tunnel testing. Part number 3901 also cross-references OSC 13841 for the same application.
What This Radiator Helps Address
- Overheating caused by a leaking or restricted radiator
- Coolant loss from cracked plastic tanks or aged seams
- Poor heat rejection from a clogged or damaged core
- Transmission or engine cooling concerns tied to radiator failure
- Fitment issues when replacing an OE-style radiator on Silverado 1500 or Sierra 1500 trucks
Installation Notes and Tips
Verify inlet and outlet orientation before installation: inlet is left and outlet is right. Confirm the vehicle uses the listed OE-style radiator layout and quick-connect oil cooler fittings before removal of the original unit. Inspect hoses, clamps, and cooler connections for wear during replacement to help prevent repeat leaks. Fits 2019-2020 Chevrolet Silverado 1500, N/A. Fits 2021 Chevrolet Silverado 1500, N/A. Fits 2019-2020 GMC Sierra 1500, N/A. Fits 2021 GMC Sierra 1500, N/A.
Quality Assurance
CSF radiators are manufactured in ISO/TSO-certified facilities and built to established performance standards. The brand has supplied radiators worldwide for decades and produces a broad range of cooling components for major vehicle platforms.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2021 | Chevrolet | Silverado 1500 | 4.3L | V6 | N/A | — |
| 2021 | GMC | Sierra 1500 | 4.3L | V6 | N/A | — |
| 2020 | Chevrolet | Silverado 1500 | 4.3L | V6 | N/A | OE style design ensures optimal fitment and performance. |
| 2020 | GMC | Sierra 1500 | 4.3L | V6 | N/A | OE style design ensures optimal fitment and performance. |
| 2019 | Chevrolet | Silverado 1500 | 4.3L | V6 | N/A | OE style design ensures optimal fitment and performance. |
| 2019 | GMC | Sierra 1500 | 4.3L | V6 | N/A | OE style design ensures optimal fitment and performance. |
| No rows match your filter. | ||||||