Mishimoto MMTC-DMAX-03SL FITS: 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Transmission Coolers
SKU: 11643705096

Mishimoto MMTC-DMAX-03SL FITS: 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Transmission Coolers

Sale price$204.13 Regular price$226.81
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

Mishimoto MMTC-DMAX-03SL FITS: 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler Transmission CoolersThere'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

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.

  • 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)
  • Stacked-plate construction for maximum durability and superior cooling

This Part Fits:

Year Make Model Submodel
2003-2005 Chevrolet Silverado 2500 HD Base
2003-2005 Chevrolet Silverado 2500 HD LS
2003-2005 Chevrolet Silverado 2500 HD LT
2003-2005 Chevrolet Silverado 2500 HD WT
2003-2005 Chevrolet Silverado 3500 Base
2003-2005 Chevrolet Silverado 3500 LS
2003-2005 Chevrolet Silverado 3500 LT
2004 Chevrolet Silverado 3500 WT
2003-2005 GMC Sierra 2500 HD Base
2003-2005 GMC Sierra 2500 HD SLE
2003-2005 GMC Sierra 2500 HD SLT
2003-2005 GMC Sierra 2500 HD WT
2003-2005 GMC Sierra 3500 Base
2003-2005 GMC Sierra 3500 SLE
2003-2005 GMC Sierra 3500 SLT
2004-2005 GMC Sierra 3500 WT
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 11643705096

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Verified Purchase
Davis
Lake Worth, US
★★★★★ 5
Quick drying
Color: White
Love this! It keeps things organized, dry, and functional
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Reviewed in the United States on March 31, 2026
J
Verified Purchase
Joe Barraza
Grantham, US
★★★★★ 5
Sponge Holder
Size: 7.125 x 2.875, Color: Black, Size: 7.125 x 2.875, Color: Black
This sponge holder is a simple upgrade that makes a big difference in keeping the sink area clean and organized. The suction cup holds firmly to the side of the sink, so it doesn’t slide around or fall off like cheaper options. It easily fits both a sponge and a steel scrubber, keeping them elevated and allowing them to dry quickly, which helps prevent odors and bacteria buildup. The open wire design is especially useful because it allows water to drain instead of pooling at the bottom. Installation is quick and requires no tools—just press it onto a clean surface and you’re good to go. It also keeps the countertop clutter-free, which is a nice bonus. Overall, it’s durable, functional, and does exactly what it’s supposed to do. Great value for anyone looking to keep their kitchen sink area tidy and hygienic.
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Reviewed in the United States on April 18, 2026
K
Verified Purchase
Kristeen T Hernandez
Dallas, US
★★★★★ 5
Very happy with this sponge holder
Size: 7.125 x 2.875, Color: Brushed Metal
Very nice size and weight. The rubber suction cups are strong adhere nicely.
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Reviewed in the United States on May 11, 2026
A
Verified Purchase
Amy S
Omaha, US
★★★★★ 1
Nice if the suction cups wouldn't have been deformed
Size: 7.125 x 2.875, Color: Brushed Metal
Update: The one I received had two suction cups deformed and wouldn't stick to the side of the sink. Realized this after placing it. Unreturnable. Perfect size. A little wider than the rest. Replacing my last one that didn't rust for years. It was fine except the hard water made the suction cups not stick otherwise it was lasting for years.
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Reviewed in the United States on April 2, 2026
J
Verified Purchase
Jack Tuckner
Alexandria, US
★★★★★ 5
3 suction cups that can hold a bottle of dish soap and a scrubber.
Size: 7.125 x 2.875, Color: Brushed Metal
Heavy Duty
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Reviewed in the United States on June 3, 2026

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