CSF Heavy-Duty Aluminum Radiator - Chevy Silverado / GMC Sierra 2500/3500 HD 6.6L Duramax 2020-2024

CSF Heavy-Duty Aluminum Radiator - Chevy Silverado / GMC Sierra 2500/3500 HD 6.6L Duramax 2020-2024

CSF SKU: CSF3975
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The CSF heavy-duty radiator upgrades the 2020-2024 Chevy Silverado and GMC Sierra 2500/3500 HD 6.6L Duramax with a 2-row 42mm aluminum core that runs about 20% thicker than the factory 1-row 35mm unit. The crossflow design integrates both an engine oil cooler and a transmission oil cooler, and high-performance multi-louvered fins with EPDM gaskets improve cooling and durability under heavy load and towing.

Specifications

Type Heavy-duty radiator (plastic tank / aluminum core)
Material Plastic tanks, aluminum core
Core 2-row 42mm, ~20% thicker than factory 1-row 35mm
Oil Cooler Integrated engine oil cooler
Transmission Cooler Integrated transmission oil cooler
Fins High-performance multi-louvered
Part Number 3975

This part fits:

Year Make Model Submodel
2020-2024 Chevrolet Silverado All
2020-2024 GMC Sierra 2500 All

Shipping

  • Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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