Chevrolet/GMC 6.6L Duramax Aluminum Radiator 2006-2010



  • Direct fit for 2006–2010 Chevrolet/GMC trucks equipped with the 6.6L Duramax
  • Full aluminum design with durable, TIG-welded construction
  • Two-row, 2.21" thick brazed aluminum core, providing ideal fluid temperatures on the street or track
  • Features a CNC-machined quick-disconnect outlet for use with the stock hose connection
  • Ideal replacement for an aged, clogged, or leaking stock radiator
  • Efficient fluid temperature reduction and superior heat dissipation makes this radiator ideal for use when hauling, towing, and/or in warm climates
  • Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system
  • Mishimoto Lifetime Warranty

Mishimoto has released a direct-fit performance aluminum radiator for the 2006–2010 Chevrolet/GMC 6.6L Duramax. Mishimoto performance radiators are manufactured from high-quality aircraft-grade aluminum with a 100% brazed aluminum core and polished end tanks. The Mishimoto 6.6L Duramax performance radiator offers increased cooling efficiency, and the all-aluminum TIG-welded construction provides a rugged design that can take the abuse of any environment or terrain. Pair your Mishimoto 6.6L Duramax aluminum radiator with our silicone coolant hose kit for the ultimate combination in cooling performance and reliability. The Mishimoto 6.6L Duramax aluminum radiator retains factory fitment and requires no modification to your truck. Whether you use your Duramax for tearing up the dragstrip or working at the job site, you can trust the Mishimoto performance radiator to keep your truck cool. As with all our Duramax performance parts, this aluminum radiator is protected by the Mishimoto lifetime warranty.

Installation Guide

Material Aluminum


This radiator was designed to fit with the most updated lower hose from Chevrolet/GMC with a larger O-ring. 2006-2007 model-year owners will need to purchase the Mishimoto radiator hose kit or the 2008-2010 OEM lower hose (part #25841843) from Chevrolet/GMC.


2006-2010 Chevrolet Silverado 2500 HD w/ 6.6L Duramax LBZ/LMM
2006-2010 Chevrolet Silverado 3500 HD w/ 6.6L Duramax LBZ/LMM
2006-2010 GMC Sierra 2500 HD w/ 6.6L Duramax LBZ/LMM
2006-2010 GMC Sierra 3500 HD w/ 6.6L Duramax LBZ/LMM

Overall Height 24.8"

DPI 2857

Drain Plug Thread Size (M12) x 1.5

Overall Length 45.1"

Tank Wall Thickness 0.08"

Outlet Quick Disconnect

Rows 2

Inlet 1.81"

Coolant Capacity 6.09

Dual Pass False

Purchase Includes

(1) Mishimoto Radiator
(1) Magnetic Drain Plug
Mishimoto Lifetime Warranty

Overall Width 5.9"

Core Length 33.86"

Core Height 23.54"

Core Size 23.54" x 33.86"

Core Thickness 2.21"


Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.