Mishimoto Transmission Cooler - 11-14 GM Duramax LML

Thoroughbred Sku #: MIMMMTC-DMAX-11SL
Manufacturer Sku #: MMTC-DMAX-11SL




  • 2011 - 2014 Chevy Silverado 2500
  • 2011 - 2014 Chevy Silverado 3500
  • 2011 - 2014 GMC Sierra 2500
  • 2011 - 2014 GMC Sierra 3500

Product Details

Product Name: Mishimoto Transmission Cooler - 11-14 GM Duramax LML
Manufacturer: Mishimoto
Manufacturer Part #: MMTC-DMAX-06SL
Thoroughbred Diesel Part #: MIMMMTC-DMAX-06SL
Fitment Notes: 11-14 GM Duramax LML

There's no greater enemy for a transmission than heat. Whether your 2011–2014 Chevrolet/GMC 6.6L Duramax is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag strip, you need to ensure that your transmission runs cool.

Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that. Our 2011–2014 Chevrolet/GMC 6.6L Duramax transmission cooler utilizes a stacked-plate design for maximum durability and powerful cooling. Aside from its durable construction, this transmission cooler is significantly larger than the stock core. The Mishimoto transmission cooler boasts a 41% greater core volume, and 73% greater fin surface area than the stock 2011–2014 Duramax transmission cooler.

The included CNC-machined adapters connect directly to the stock transmission cooler lines for leak-free cooling. Direct-fit brackets and tailor-made hoses make installation easy. Like all Mishimoto products, this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it.

  • Direct fit for all 2011–2014 Chevrolet/GMC 6.6L Duramax (LML)
  • Stacked-plate construction for maximum durability and superior cooling
  • CNC-machined adapters make it easy to connect Mishimoto cooler to stock fluid lines or AN lines
  • 41% greater core volume than stock cooler
  • 73% greater external fin surface area over stock cooler
  • Mishimoto Lifetime Warranty
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