Part #: 3843

CSF 3843 Radiator

12 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Chevrolet and GMC, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD
Easy Returns — Return within 60 days for a full refund
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Overview of CSF Radiator Part Number 3843

The CSF radiator 3843 is engineered for heavy-duty cooling performance in Chevrolet and GMC trucks. Designed specifically for Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD models, this radiator ensures reliable engine temperature management under demanding conditions.

  • Core thickness: 2 3/16 inches for efficient heat dissipation
  • Core dimensions: 27 7/16 inches width by 33 7/16 inches length
  • Constructed with an aluminum core and plastic tanks for durability and corrosion resistance
  • Cross flow design with 2 core rows to optimize coolant flow
  • Inlet diameter: 2 inches (left side), outlet diameter: 2 1/4 inches (right side)
  • Includes a high-efficiency plate type oil cooler (11 1/2 inches, right side)
  • OEM style plastic tanks with quick-connect outlet for ease of integration

Detailed Product Description

The CSF radiator 3843 features a robust aluminum core measuring 2 3/16 inches thick, 27 7/16 inches wide, and 33 7/16 inches long, providing ample surface area for heat exchange. The plastic tanks are designed to match OEM specifications, ensuring compatibility and durability. This radiator uses a cross flow configuration with two core rows, which enhances coolant circulation and heat transfer efficiency. The inlet and outlet diameters are sized at 2 inches and 2 1/4 inches respectively, positioned on the left and right sides to fit the cooling system layout of Chevrolet and GMC heavy-duty trucks. Additionally, the integrated high-efficiency plate type oil cooler on the right side supports engine oil temperature regulation, contributing to overall engine longevity.

Compatible Vehicles and Applications

  • Chevrolet Silverado 2500 HD
  • Chevrolet Silverado 3500 HD
  • GMC Sierra 2500 HD
  • GMC Sierra 3500 HD

This radiator is designed to replace factory units in these models, addressing common cooling system issues and maintaining optimal engine performance.

Common Issues Addressed by CSF Radiator 3843

  • Overheating due to clogged or damaged radiator cores
  • Coolant leaks from cracked or worn plastic tanks
  • Reduced cooling efficiency from corrosion or core damage
  • Oil temperature regulation problems due to faulty oil coolers
  • Incompatibility with OEM cooling system components

Installation Notes and Tips

When installing the CSF radiator 3843, ensure all coolant hoses match the specified inlet and outlet diameters (2 inches left inlet, 2 1/4 inches right outlet). The radiator’s cross flow design requires proper orientation for optimal coolant flow. The quick-connect outlet facilitates easier connection but verify secure fittings to prevent leaks. Since the radiator does not include a cap, reuse the existing OEM cap or source a compatible replacement. Check for proper alignment with mounting points on Chevrolet Silverado and GMC Sierra heavy-duty models to avoid installation issues.

Quality Assurance and Warranty

CSF radiators are manufactured to meet OEM standards, using corrosion-resistant aluminum cores and durable plastic tanks. This radiator is free of hazardous materials and designed for long service life in demanding applications. While specific warranty details are not provided here, CSF products typically come with manufacturer-backed warranties covering defects in materials and workmanship. Consult the product documentation or CSF directly for warranty terms related to part number 3843.

BrandCSF
Part Number3843
Core Thickness2 3/16
Core Width27 7/16
Core MaterialAluminum
Tank MaterialPlastic
Core Length33 7/16
Inlet Diameter2 left
Outlet Diameter2 1/4 right
Down Flow Or Cross Flow TypeCross flow
Radiator Core Row Quantity2
Cap IncludedNo
Box Height (in)6 5/8
Box Length (in)47
Box Weight (lbs)37
Box Width (in)31 13/16
Hazardous MaterialNo
Inlet Length (in)28 7/16
Inlet Width (in)2 11/16
Oil Cooler (in)11 1/2 right (high-effeciency plate type)
Outlet Length (in)28 7/16
Outlet Width (in)2 11/16
Tech NoteO.e.m. style plastic tanks & aluminum core with quick-connect out

This part fits 12 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2019ChevroletSilverado 2500 HD6.6LV8N/A
2019ChevroletSilverado 3500 HD6.6LV8N/A
2019GMCSierra 2500 HD6.6LV8N/A
2019GMCSierra 3500 HD6.6LV8N/A
2018ChevroletSilverado 2500 HD6.6LV8N/A
2018ChevroletSilverado 3500 HD6.6LV8N/A
2018GMCSierra 2500 HD6.6LV8N/A
2018GMCSierra 3500 HD6.6LV8N/A
2017ChevroletSilverado 2500 HD6.6LV8N/A
2017ChevroletSilverado 3500 HD6.6LV8N/A
2017GMCSierra 2500 HD6.6LV8N/A
2017GMCSierra 3500 HD6.6LV8N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

136902320844784224661GM3010615

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.