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    • Mishimoto 01-05 Chevrolet/GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Line Kit
    • Mishimoto 01-05 Chevrolet/GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Line Kit
    • Mishimoto 01-05 Chevrolet/GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Line Kit
    • Mishimoto 01-05 Chevrolet/GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Line Kit
    Sale!

    Mishimoto 01-05 Chevrolet/GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Line Kit

    Vendor: Mishimoto
    Part Number: MMTCL-DMAX-01
    Save $35.05
    Sale Price $349.95 Regular Price $385.00

    In Stock

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    Every truck owner knows that it doesn't matter how powerful or reliable your engine is if you can't get any power to the wheels. The transmission mated to your 2001-2005 LB7/LLY Duramax is essential to everything your truck does, and keeping it cool is crucial. Upgrading your transmission cooler with a Mishimoto performance transmission cooler is a good start, but the fluid still needs to get to the cooler. That's where this 2001-2005 GM 6.6L Duramax (LB7/LLY) Transmission Line Kit comes in. These high performance lines are constructed with a durable PTFE line that's wrapped in a high-strength nylon braid. The PTFE line is extremely oil and heat resistant for durability in even the harshest environments. To protect the lines against higher line pressures that come with performance transmissions, We've wrapped them in braided high-strength nylon. This wrap prevents expansion and further protects the lines from abrasion. Finally, these lines are capped off with -10AN fittings for a secure and leak-free connection. Like all Mishimoto Duramax products, these transmission lines are backed by our Mishimoto Lifetime Warranty for a lifetime of performance.

    Installation Instructions
    • High-strength nylon outer braid prevents expansion under high pressure and protects line against abrasion
    • PTFE inner liner is extremely oil and heat resistant for maximum durability
    • Working pressure of 2,000 psi and burst pressure of 6,000 psi

    This Part Fits:

    Year Make Model Submodel
    2001-2005 Chevrolet Silverado 2500 HD Base
    2001-2005 Chevrolet Silverado 2500 HD LS
    2001-2005 Chevrolet Silverado 2500 HD LT
    2004-2005 Chevrolet Silverado 2500 HD WT
    2001-2005 Chevrolet Silverado 3500 Base
    2001-2005 Chevrolet Silverado 3500 LS
    2001-2005 Chevrolet Silverado 3500 LT
    2004 Chevrolet Silverado 3500 WT
    2002-2005 GMC Sierra 2500 HD Base
    2001-2002 GMC Sierra 2500 HD SL
    2001-2005 GMC Sierra 2500 HD SLE
    2001-2005 GMC Sierra 2500 HD SLT
    2003-2005 GMC Sierra 2500 HD WT
    2002-2005 GMC Sierra 3500 Base
    2001-2002 GMC Sierra 3500 SL
    2001-2005 GMC Sierra 3500 SLE
    2001-2005 GMC Sierra 3500 SLT
    2004-2005 GMC Sierra 3500 WT
    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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