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
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 5 - Jul 10

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 1904 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
Jessica
Lowell, US
★★★★★ 5
Perfect!
Color: Royal Blue, Size: 12 Years, Color: Royal Blue, Size: 12 Years
I was nervous about purchasing something like this at the last minute. But based on the previous reviews I decided to take a chance. The suit is nice and the material feels really good. Not thin or cheap at all. My son looked so handsome and grown up. He’s on the slim side so he does have extra room but I don’t mind it because he can definitely grow into it. I did purchase a separate tie because I wanted a pattern to complement the blue. I’d definitely purchase again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
A
Verified Purchase
Angelbaby
Fort Morgan, US
★★★★★ 4
Big in waist
Color: Grey, Size: 12 Years
Very nice suit, the material was nice. My son is an average build, the suit fit on the length but unfortunately the pants were huge in the waist. Even with the inside waist adjuster and a belt he couldn't wear them. Which was disappointing because overall the rest of the suit was perfect!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
M
Verified Purchase
Mckayla
Alexandria, US
★★★★★ 5
Perfect
Color: Royal Blue, Size: 8 Years
The tops fit perfectly however my 6 year old is very tall and slim so the pants were a little big but at least the adjustable straps on the inside will help..love the color
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
T
Verified Purchase
tonye andrews
Boise, US
★★★★★ 5
Worth the money
Color: Navy Blue, Size: 12 Years, Color: Navy Blue, Size: 12 Years
Came just in time for my son graduation and he was very sharp and handsome
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
D
Verified Purchase
DOESNT come with everything buy it new don’t buy it used
Alexandria, US
★★★★★ 5
Buy it, you won’t regret it
Color: Royal Blue, Size: 6 Years, Color: Royal Blue, Size: 6 Years
Love it. Beautiful I returned 2 because I accidentally ordered smaller Reordered and fits perfect. The left one is size 6. Reordered 7 and fits better because he is tall The left I had ordered size 2 accidentally and it was size 4 Totally recommend My returns might count as recent returned. But on my opinion please do not look at that part. Great material. Shirt is beautiful Cloth for everything is perfect
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026

recommand products