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

Mishimoto Transmission Cooler - Chevrolet /GMC 2017-2019 6.6L Duramax L5P Transmission Cooler

Mishimoto SKU: MISMMTC-DMAX-17SL
Price
9% OFF
In Stock – Ready to Ship
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Shipping calculated at checkout.

The Mishimoto transmission cooler for the 2017-2019 Chevrolet/GMC 6.6L Duramax L5P is a direct-fit, stacked-plate upgrade that lowers fluid temperatures for towing, fleet, and daily-driven trucks running the Allison 1000 transmission. Its 13-row core delivers 67% greater core volume and 164% greater fin surface area than the stock cooler, and CNC-machined adapters connect to the factory lines (or AN lines) for leak-free flow with direct-fit brackets, tailor-made hoses, and an air-temp sensor relocation bracket. Note: Silverado models require minor grille trimming; GMC Sierra does not.

Specifications

Type Direct-fit transmission cooler
Core 13-row stacked-plate
Transmission Allison 1000
vs. Stock +67% core volume, +164% fin area
Fittings CNC-machined adapters (stock line or AN)
Note Silverado requires minor grille trimming
Part Number MMTC-DMAX-17SL
Warranty Mishimoto Lifetime Warranty

This part fits:

Year Make Model Submodel
2017-2019 Chevrolet Silverado 2500 HD High Country
2017-2019 Chevrolet Silverado 2500 HD LT
2017-2019 Chevrolet Silverado 2500 HD LTZ
2017-2019 Chevrolet Silverado 2500 HD WT
2017-2019 Chevrolet Silverado 3500 HD High Country
2017-2019 Chevrolet Silverado 3500 HD LT
2017-2019 Chevrolet Silverado 3500 HD LTZ
2017-2019 Chevrolet Silverado 3500 HD WT
2017-2019 GMC Sierra 2500 HD Base
2017-2019 GMC Sierra 2500 HD Denali
2017-2019 GMC Sierra 2500 HD SLE
2017-2019 GMC Sierra 2500 HD SLT
2017-2019 GMC Sierra 3500 HD Base
2017-2019 GMC Sierra 3500 HD Denali
2017-2019 GMC Sierra 3500 HD SLE
2017-2019 GMC Sierra 3500 HD SLT

Shipping

  • Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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