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MMTC-DMAX-17SL Mishimoto Transmission Cooler - GM 2017-2019

Mftr. Part#: MMTC-DMAX-17SL
UPC: 840197700778
Manufacturer: Mishimoto
Mishimoto's new transmission cooler for your 2017-2019 GMC/Duramax L5P has 67% greater core volume and 164% greater external fin surface area over the stock OEM cooler. If you tow, then this cooler is a must!

PRODUCT DETAILS (click to expand)

Mftr. Part#MMTC-DMAX-17SL
Weight (lbs.):17.00 lbs.
Dimensions:4.00" x 37.00" x 11.00"

PRODUCT SPECS (click to expand)

Attribute nameAttribute value
Truck Type/ModelDuramax
Truck FamilyGM Duramax L5P 2017-2019
Product TypeTransmission Cooler
Transmission TypeAllison A1000


There’s no greater enemy for a transmission than heat. Whether your 2017-2019 Chevy/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. the 2017-2019 Chevy/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 67% greater core volume, and 164% greater fin surface area than the stock 2017-2019 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 Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it.


  • Direct fit for all 2017-2019 Chevrolet/GMC 6.6L Duramax (L5P)
  • 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
  • 67% greater core volume than stock cooler
  • 164% greater external fin surface area over stock cooler
  • Mishimoto Lifetime Warranty