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

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. 

Features:

• 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

Specifications:

• Rows: 13
• Core Length (in) 27.95
• Core Height (in) 5.78
• Core Thickness (in) 1.25
• Engine Codes: 6.6L Duramax L5P w/ Allison 1000 Transmission
• Chassis Codes: GMT K2HC / GMT K2HG

Fitment:

• 2017-2019 GMC Sierra 2500/3500 6.6L Duramax
• 2017-2019 Chevrolet Silverado 2500/3500 6.6L Duramax

Included:

• Mishimoto Stacked Plate Transmission Cooler
• 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

Note:

• Silverado models require minor trimming of the grille to fit