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  • Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
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Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Load image into Gallery viewer, Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler

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Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler

Mishimoto
misMMTC-DMAX-11SL
In stock
Transmission Cooler
$549.00 $515.99
Maintaining optimal transmission temperature is crucial for the longevity and performance of your vehicle, especially for...
$515.99
Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax (LML) Transmission Cooler
Description

Maintaining optimal transmission temperature is crucial for the longevity and performance of your vehicle, especially for heavy-duty applications like towing, fleet use, or high-performance driving. The Mishimoto 11-14 Chevrolet / GMC 6.6L Duramax transmission cooler is engineered to provide superior cooling capacity with its innovative stacked-plate design, which is known for exceptional durability and heat dissipation. This direct-fit cooler is specifically designed for 2011-2014 models with Allison transmissions, ensuring a seamless installation and reliable operation. Its larger core volume, which is 41 percent greater than the stock, along with 73 percent more fin surface area, significantly improves heat transfer, helping to keep your transmission running at optimal temperatures even under demanding conditions. The included CNC-machined adapters connect directly to the stock transmission lines, providing a leak-free fit, while the custom brackets and hoses facilitate straightforward installation. As a Mishimoto product, this transmission cooler is backed by a lifetime warranty and accident protection, offering peace of mind and dependable cooling for as long as you own your vehicle.

Features:

  • CNC-machined adapters enable easy connection to stock fluid lines or AN lines
  • Direct-fit design for all 2011-2014 Chevrolet and GMC models with Allison transmissions (LML)
  • Stacked-plate construction ensures maximum durability and superior cooling performance

Fitment:
2011 Chevrolet Silverado 2500 HD LT
2011 Chevrolet Silverado 2500 HD LTZ
2011 Chevrolet Silverado 2500 HD WT
2011 Chevrolet Silverado 3500 HD LT
2011 Chevrolet Silverado 3500 HD LTZ
2011 Chevrolet Silverado 3500 HD WT
2011 GMC Sierra 2500 HD Denali
2011 GMC Sierra 2500 HD SLE
2011 GMC Sierra 2500 HD SLT
2011 GMC Sierra 2500 HD WT
2011 GMC Sierra 3500 HD Denali
2011 GMC Sierra 3500 HD SLE
2011 GMC Sierra 3500 HD SLT
2011 GMC Sierra 3500 HD WT
2012 Chevrolet Silverado 2500 HD LT
2012 Chevrolet Silverado 2500 HD LTZ
2012 Chevrolet Silverado 2500 HD WT
2012 Chevrolet Silverado 3500 HD LT
2012 Chevrolet Silverado 3500 HD LTZ
2012 Chevrolet Silverado 3500 HD WT
2012 GMC Sierra 2500 HD Denali
2012 GMC Sierra 2500 HD SLE
2012 GMC Sierra 2500 HD SLT
2012 GMC Sierra 2500 HD WT
2012 GMC Sierra 3500 HD Denali
2012 GMC Sierra 3500 HD SLE
2012 GMC Sierra 3500 HD SLT
2012 GMC Sierra 3500 HD WT
2013 Chevrolet Silverado 2500 HD LT
2013 Chevrolet Silverado 2500 HD LTZ
2013 Chevrolet Silverado 2500 HD WT
2013 Chevrolet Silverado 3500 HD LT
2013 Chevrolet Silverado 3500 HD LTZ
2013 Chevrolet Silverado 3500 HD WT
2013 GMC Sierra 2500 HD Denali
2013 GMC Sierra 2500 HD SLE
2013 GMC Sierra 2500 HD SLT
2013 GMC Sierra 2500 HD WT
2013 GMC Sierra 3500 HD Denali
2013 GMC Sierra 3500 HD SLE
2013 GMC Sierra 3500 HD SLT
2013 GMC Sierra 3500 HD WT
2014 Chevrolet Silverado 2500 HD LT
2014 Chevrolet Silverado 2500 HD LTZ
2014 Chevrolet Silverado 2500 HD WT
2014 Chevrolet Silverado 3500 HD LT
2014 Chevrolet Silverado 3500 HD LTZ
2014 Chevrolet Silverado 3500 HD WT
2014 GMC Sierra 2500 HD Denali
2014 GMC Sierra 2500 HD SLE
2014 GMC Sierra 2500 HD SLT
2014 GMC Sierra 2500 HD WT
2014 GMC Sierra 3500 HD Denali
2014 GMC Sierra 3500 HD SLE
2014 GMC Sierra 3500 HD SLT
2014 GMC Sierra 3500 HD WT

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You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.

Returns

Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.

Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.

Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.

Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).

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