★★★★★ 5
Useful
Very secure attachment
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Reviewed in the United States on April 8, 2026
Mishimoto 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Mishimoto 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission CoolerSKU: MMTC DMAX 03SL UPC: 811580034084 Mishimoto 03 05 Chevrolet GMC 6. 6L Duramax (LB7 LLY) Transmission Cooler Control transmission heat in your 2003 2005 Chevrolet Silverado 2500 HD 3500 or GMC Sierra 2500 HD 3500 with 6. 6L Duramax LB7 or LLY engine using this Mishimoto transmission cooler. The stacked plate design delivers powerful cooling for towing fleet work or drag strip runs. This direct fit cooler features a larger core for reliable
Quick Dispatch:
Your Mishimoto 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Mishimoto 03-05 Chevrolet / GMC 6.6L Duramax (LB7/LLY) Transmission Cooler ships.
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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
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4.7 ★★★★★
Based on 856 reviews
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Product Reviews
★★★★★ 4
Good
Good
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Reviewed in the United States on March 22, 2026
★★★★★ 5
Hubby was happy
My husband was happy with these. He didn’t complain so gold star.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
If you need them,good place to order them
Great but was 2 days late weather. Was bad,in lot of places,
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Reviewed in the United States on March 14, 2026
★★★★★ 5
Great quality
Product exactly as described and worked perfectly for my 2008 Honda accord
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Reviewed in the United States on September 9, 2025
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