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Mishimoto 17-19 GM 6.6L Duramax (L5P) Transmission Cooler - Silver

Name: Mishimoto 17-19 GM 6.6L Duramax (L5P) Transmission Cooler - Silver
Brand: Mishimoto
SKU: misMMTC-DMAX-17SL
Price: 386.00 USD

MPN MMTC-DMAX-17SL · Store SKU misMMTC-DMAX-17SL

$386.00

IN STOCK7 ready to ship

Supplier stock checked 11/7/2026, 8:34:45 AM UTC. Adding a part does not reserve it.

30-day returns for unopened, unused new parts

Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

Shipping & returns ↗This policy does not limit rights required by law.

Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.

Product details

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-percent greater core volume, and 164-percent 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. Automatic transmission oil cooler designed to regulate fluid temperature and prevent overheating. Enhances transmission longevity, maintains performance, and features durable construction with a precise fit. Transmission Cooler, Silver, fits Chevrolet/GMC 6.6L Duramax L5P 2017-2019

Manufacturer fitment & guides

Check MMTC-DMAX-17SL against the manufacturer’s application information below.

Mishimoto manufacturer vehicle catalog ↗

Part-specific notes

California Proposition 65: Y

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Mishimoto 17-19 GM 6.6L Duramax (L5P) Transmission Cooler - Silver

Product details

Manufacturer fitment & guides

Part-specific notes

THE NEXT PART
OF YOUR BUILD.

Free shipping on $100+ orders.

Build with the right brands.

Find your next upgrade.

Make the whole setup work.

A few things to know.

Your build.

Delivery & checkout

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