SKU: 16791646327

Mishimoto Transmission Cooler 17-19 GM 6.6L Duramax L5P

Sale price$224.97 Regular price$249.97
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  • USA
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

Mishimoto Transmission Cooler 17-19 GM 6.6L Duramax L5PIf youre experiencing a transmission temperature increase, noises or poor transmission performance, or a transmission line leak, you could have a failed transmission cooler in your durable Duramax. Or maybe, you just want to upgrade to make your performance that much better, either way, and hopefully its the latter, Mishimoto has you covered with the Transmission Cooler that fits the 2017 2019 Duramax. Mishimotos 2017 2019 Chevy GMC 6. 6L L5P Duramax

If you’re experiencing a transmission temperature increase, noises or poor transmission performance, or a transmission line leak, you could have a failed transmission cooler in your durable Duramax. Or maybe, you just want to upgrade to make your performance that much better, either way, and hopefully it’s the latter, Mishimoto has you covered with the Transmission Cooler that fits the 2017-2019 Duramax.

Mishimotos 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 the Mishimoto Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it.

IMPORTANT NOTE:

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

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 16791646327

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tjw
Cuba, US
★★★★★ 3
Way too narrow
Size: 9.5 Wide, Color: Burgundy Polished Full Grain
I ordered a wide in this shoe, but it was still way too narrow. I had to return them. Otherwise, it looked like a nice quality shoe.
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Reviewed in the United States on February 12, 2026
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BetterEveryDay
New York, US
★★★★★ 5
I usually wear 11.5's, but I buy 1/2 size smaller to accommodate for stretch. Leather relaxes.
Size: 11, Color: Burgundy Polished Full Grain
5 STARS: These shoes are awesome. I keep coming back for more. I have major foot problems, have tried all kinds of shoes, orthotics, and inserts... but believe it or not, these shoes work better than any of that stuff. I wear them daily. I buy lots of them, for home, for church, and I'm getting my first pair of J&M boots today, for winters in Indiana... Brrrr
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Reviewed in the United States on December 18, 2025
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Doc
Waukegan, US
★★★★★ 5
Great price great shoe
Size: 12, Color: Burgundy Polished Full Grain
Excellent shoe. Tried the Sebago penny loafer and the sizing was ridiculous. These J and M are sized perfectly. I’ve had them before and they wear like iron. Very comfortable right out of the box.
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Reviewed in the United States on May 23, 2026
R
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roger mendes
Louisville, US
★★★★★ 5
One of the best shoes
Size: 9.5, Color: Black Polished Full Grain
Outstanding. Fashionable, most comfortable and good construction. No sines of use after quite some time. Highly recommended.
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Reviewed in the United States on March 21, 2026
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xyz
Phoenix, US
★★★★★ 4
Quality shoe but with a slight squeak.
Size: 10 Wide, Color: Burgundy Polished Full Grain
Nice shoes with the classic Penny Loafer design. Fit was better than another brand I tried. Only reason not 5 starts is disappointment due to a slight squeak at times when walking.
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Reviewed in the United States on August 11, 2025

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