CSF OEM Style Radiator Part Number: 3975 Brand New • For 2020-2026 Chevy Silverado / GMC Sierra 2500HD & 3500HD 6.6L Gas BRAND NEW New, unused radiator. OEM-style direct replacement designed for select Chevrolet Silverado HD and GMC Sierra HD 6.6L gas applications.
Replace your worn, leaking, or damaged factory radiator with the CSF 3975 OEM Style Radiator. Designed as a direct-fit replacement for select GM heavy-duty gas truck applications, this radiator is built to restore dependable cooling performance while maintaining OEM-style fitment and factory-style connections.
CSF radiators are engineered to high performance standards and designed for dependable daily use, towing, and work-truck applications. With OEM-style plastic tank / aluminum core construction and a direct replacement design, the CSF 3975 is a strong solution for restoring cooling system reliability on your Silverado HD or Sierra HD.
Features & Benefits
- OEM specified plastic tank / aluminum core construction
- Direct-fit replacement design
- High-performance multi-louvered fin design
- 100% leak tested before leaving the factory
- Special-grade EPDM rubber gaskets designed to withstand extreme temperatures
- Quick-connect outlet pipe and quick-connect oil cooler fittings
- High-performance transmission cooler with built-in turburlator, when applicable
- All components installed, torqued, and tested during assembly
Product Specifications Brand CSF Part Number 3975 Product Type Radiator Core Material Aluminum Tank Material Plastic Core Rows 1 Flow Type Cross Flow Core Length 37 9/16 in. Core Width 23 3/8 in. Core Thickness 1 1/4 in. Top Hose Fitting 1 5/16 in. Left Bottom Hose Fitting 1 1/2 in. Right Oil Cooler 11 1/2 in. Left & Right (High-Efficiency Plate Type) Radiator Cap Supplied No Tech Note O.E.M. style plastic tank & aluminum core with quick-connect outlet pipe & quick-connect oil cooler fittings. Complete Vehicle Fitment
Fits the following applications:
Years Make Model Engine 2020-2026 Chevrolet Silverado 2500 HD 6.6L V8 6571cc 401ci Naturally Aspirated 2020-2026 Chevrolet Silverado 3500 HD 6.6L V8 6571cc 401ci Naturally Aspirated 2020-2026 GMC Sierra 2500 HD 6.6L V8 6571cc 401ci Naturally Aspirated 2020-2026 GMC Sierra 3500 HD 6.6L V8 6571cc 401ci Naturally Aspirated Interchange / Reference Numbers
- DPI: 13885
- OEM: 84565799
- OEM: 84889155
- Partslink: GM3010625
Fitment Note: Please verify compatibility with your exact year, make, model, engine, and OE radiator configuration before purchase. Buyer Notes
- Please confirm part number 3975 before ordering
- Professional installation is recommended
- Review all listing photos and included components carefully
- Verify fitment and interchange prior to purchase
CSF 3975 OEM Style Radiator
2020-2026 Silverado / Sierra 2500HD & 3500HD 6.6L Gas
Brand New • Direct Replacement Style
