MMTC-DMAX-03SL Transmission Cooler, fits Chevrolet/GMC 6.6L Duramax (LB7/LLY) 2003-2005
InfoVehicle Info Needed
MISHIMOTOPART NUMBER: 690-TC-DMAX-03SL

MMTC-DMAX-03SL Transmission Cooler, fits Chevrolet/GMC 6.6L Duramax (LB7/LLY) 2003-2005

$49895
5 left in stock
ShippingShips on Sep 14, 2026
Lowest PriceLowest Price Guarantee

Transmission Cooler
  • Fits Chevrolet/GMC 6.6L Duramax (LB7/LLY) 2003-2005

    Mishimoto MMTC-DMAX-03SL Features:

    There's no greater enemy for a transmission than heat. Whether your 2003-2005 Chevy/GMC 6.6L 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 2003-2005 Chevy/GMC 6.6L Duramax transmission cooler utilizes a stacked-plate design for maximum durability and powerful cooling. Aside from It's durable construction, this transmission cooler is significantly larger than the stock core. The Mishimoto transmission cooler boasts a 174-percent greater core volume, and 192-percent greater fin surface area than the stock 2003-2005 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.

    • Includes Mishimoto Stacked Plate Transmission Cooler, CNC-Machined Quick-Disconnect to Hose Barb Adapters, Stock-style Quick-Disconnect Fittings, Transmission Hoses, Mounting Brackets, Worm Gear Clamps, Zip Tie, Mounting Hardware
    • Direct-fit for all 2003-2005 Chevrolet/GMC 6.6L Duramax (LB7/LLY)
    • CNC-machined adapters make it easy to connect Mishimoto cooler to stock fluid lines or AN lines
    • 174-percent greater core volume than stock cooler
    • 192-percent greater external fin surface area over stock cooler
  • Part TypeFluid Cooler
    BrandMISHIMOTO
    Package Height4.0
    Package Width14.0
    Package Length29.0
    Weight11.0 PG
    Part CategoryPerformance Parts
    Part FitmentDirect Fit
    Vendor Part NumberMMTC-DMAX-03SL
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning
    Your Cart

    Your shopping cart is empty!