Home/All Parts/Mishimoto/Mishimoto 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler

TRACKED DELIVERY

Fitment data included Warranty backed Tracked delivery

Product Details

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.

Features

CNC-machined adapters make it easy to connect Mishimoto cooler to stock fluid lines or AN lines
Direct-fit for all 2003-2005 Chevrolet/GMC with Allison transmission (LB7/LLY)

Part number: MMTC-DMAX-03SL (MMTCDMAX03SL)

Confirm this fits your vehicle. Use the “Check Fit” selector, or see the Vehicle Compatibility list below for confirmed years, makes and models.

Mishimoto

Mishimoto 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler

Name: Mishimoto 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler
Brand: Mishimoto
SKU: MISMMTC-DMAX-03SL
Price: 698.53 CAD
Availability: InStock

Part #: MISMMTC-DMAX-03SL In stock

$698.53

Price in CAD. Taxes & shipping calculated at checkout.

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Shipping to Canada: $189.00 · ships from a US warehouse, duties included · usually 1-3 weeksEstimate, not a guarantee — if an order will take longer we contact you before taking payment.

Tracked shipping across CanadaShips from our distributor’s US warehouse · Duties included · Rate shown at checkout · 30-day returns · Shipping details

Tracked delivery across Canada.

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Fits these vehicles

2003–2005 Chevrolet Silverado 2500 HD2003–2005 GMC Sierra 2500 HD2003–2005 Chevrolet Silverado 35002003–2005 GMC Sierra 3500

Fitment data is provided as a guide — please verify before purchase.

Vehicle fitment

Estimated fitment — verify before purchase

Years	Make	Model
2003–2005	Chevrolet	Silverado 2500 HD
2003–2005	GMC	Sierra 2500 HD
2003–2005	Chevrolet	Silverado 3500
2003–2005	GMC	Sierra 3500

Engine: 6.6L Duramax

Check fitment before you order. We publish fitment from manufacturer and industry data and take care with it, but fit can depend on trim, cab and bed configuration, factory options and any modifications already on your vehicle. If you are unsure, contact us before ordering — and if fitment we published turns out to be wrong, we cover the return.