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Mishimoto Transmission Cooler for 2017-2019 L5P Duramax

Pricing: $454.95

Free Shipping - Ground


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
There’s no greater enemy for a transmission than heat. Whether your 2017-2019 Chevy/GMC 6.6L L5P 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 2017-2019 Chevy/GMC 6.6L L5P 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 L5P 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.

(1) Mishimoto Stacked Plate Transmission Cooler
(2) CNC-Machined Quick-Disconnect to Hose Barb Adapters
(2) Stock-style Quick-Disconnect Fittings
(2) Transmission Hoses
(1) Air Temperature Sensor Relocation Bracket
(4) Mounting Brackets
(4) Worm Gear Clamps
Mounting Hardware
Mishimoto Lifetime Warranty

*Silverado models require minor trimming of the grille to fit.


Install Guide



Shipping Information

  • Item Requires Shipping
  • 15.0 lbs.
  • W10.0000” x H8.0000” x L20.0000”
  • Free Shipping - Ground

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