Transmission Cooler, fits Chevrolet/GMC 6.6L Duramax (L5P) 2017-2019
Transmission Cooler, fits Chevrolet/GMC 6.6L Duramax (L5P) 2017-2019
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- 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-percent greater core volume than stock cooler
- 164-percent greater external fin surface area over stock cooler
- Mishimoto Lifetime Warranty
Installation Difficulty: Easy
- 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-percent greater core volume than stock cooler
- 164-percent greater external fin surface area over stock cooler
- Mishimoto Lifetime Warranty
Product Description
TECH SPECS
| Rows | 13 |
|---|---|
| Core Length (in) | 27.95 |
| Core Height (in) | 5.78 |
| Core Thickness (in) | 1.25 |
| Engine Codes | 6.6L Duramax LML w/ Allison 1000 Transmission |
| Chassis Codes | GMT K2HC GMT K2HG |
| Note | Silverado models require minor trimming of the grille to fit. |
Compatible Vehicles
Installation Guides
Purchase Includes
CNC-Machined Quick-Disconnect to Hose Barb Adapters
Stock-style Quick-Disconnect Fittings
Transmission Hoses
Air Temperature Sensor Relocation Bracket
Mounting Brackets
Worm Gear Clamps
Mounting Hardware
Mishimoto Lifetime Warranty
Note:
Silverado models require minor trimming of the grille to fit.Excess heat is the bitter rival of any vehicle, but especially when it comes to heavy-duty trucks, like the 2015+ 6.6L Duramax powered Chevys and GMCs. The HD Silverado and Sierra are already mega heat-generating machines on their own. Still, GM designed these trucks for the express purpose of pulling, towing, hauling heavy payloads, and generating even more heat. While you might have opted for the Heavy-Duty Duramax powerplant, the engine is only half of the equation. No matter if you chose to upgrade to the coveted Allison gearbox or not, the transmission is the other half of what slots these trucks into the Heavy-Duty category. Keeping those gears at prime operating temperature is vital and exactly what we have in mind.
GM also had the same thought and has been including an external transmission cooler on all their trucks since at least 2001. Like the coolers found installed
With so many model years to cover, our biggest challenge would be making one cooler fit them all. But we had a plan.
Our 2001-2014 Chevy / GMC Duramax transmission cooler blog so far has focused on the two stock coolers. We looked at the early, comically small, transmission cooler. We looked at the later, and larger but poorly placed, transmission cooler. Finally, after almost a year of R&D, we get to look at Mishimoto's solution to the stock coolers' shortcomings. But first, we need to take a closer look at one more of the stock components.
At the end of our last post, we mentioned wanting to use one large cooler to fit all 14 model years
No matter how many trucks I write about, I'm always surprised how often a critical part of the drivetrain is underdeveloped. It's even more surprising when a truck built for towing and hauling has a major flaw in the transmission system. The transmission is the heart of towing, and when you're asking it to carry over five tons of truck and trailer up a grade, any weakness in the system is sure to show itself. However, the Allison transmission mated to 2001-2014 Duramax engines is not that weak point.
Extreme heat is always the enemy, especially when it comes to vehicles equipped with an automatic transmission. The Allison gearbox mated with your 6.6L Duramax is no exception. With the high temperatures produced by an automatic transmission, it seems almost cruel that the sweltering summer heat comes when most of the towing of campers, boats, and other outdoor toys happens. GM did include some help to keep your gears cool. Unfortunately, it's a little small.
For such an iconic towing machine, it seems strange to equip it with
Warranty
Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.
For our complete warranty policy, please click here.
Frequently Asked Questions
