2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Transmission Coolers, Lines & Accessories

Your GM 6.6L transmission needs to operate at optimal temperatures to ensure it performs at its best during towing, off-roading, and daily driving. High-performance activities like towing and off-roading place extra stress on your transmission, generating excessive heat that can cause premature damage. To gain optimal performance and long-term reliability, our selection of transmission coolers and thermal bypasses is the perfect solution! Whether you choose upgraded transmission coolers for enhanced cooling efficiency or thermal bypasses to maintain ideal fluid temperatures, we offer everything you need to keep your transmission running smoothly and reliably. Check out our selection of Transmission pans, filters, fluid for additional cooling performance! GM Duramax Fitments: 2011, 2012, 2013, 2014, 2015, 2016 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.

GM Duramax>2011-2016 6.6L LML
Availability
Manufacturer
Make
Model
Year
Price
$0
$720.95
Rating
Loading products...
Filter
15 products
Sort by:
Best selling
Availability
Manufacturer
Make
Model
Year
Price
$0
$720.95
Rating
PPE 124063000 Performance Transmission Cooler Bar & Plate | 11-14 GM 6.6L Duramax
PPE 124063000 Performance Transmission Cooler Bar & Plate | 11-14 GM 6.6L Duramax

PPE

PPE 124063000 Performance Transmission Cooler Bar & Plate | 11-14 GM 6.6L Duramax

Price
$350.99
Premier Performance 1.113.2 5/8 inch Allison Transmission Repair Lines | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Premier Performance 1.113.2 5/8 inch Allison Transmission Repair Lines | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Premier Performance

Premier Performance 1.113.2 5/8 inch Allison Transmission Repair Lines | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$325
PPE 124063000 Allison Performance Transmission Cooler | 11-14 GM 6.6L Duramax
PPE 124063000 Allison Performance Transmission Cooler | 11-14 GM 6.6L Duramax

PPE

PPE 124063000 Allison Performance Transmission Cooler | 11-14 GM 6.6L Duramax

Price
$350.99
PPE 124064000 Allison Performance Transmission Cooler | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 124064000 Allison Performance Transmission Cooler | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 124064000 Allison Performance Transmission Cooler | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$350.99
PPE 129021115 Transfer Case Brace | 2011-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 129021115 Transfer Case Brace | 2011-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 129021115 Transfer Case Brace | 2011-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$134.99
Cognito 110-90278 Allison Transmission Bracket | 2005-2019 GM Silverado/Sierra 2500HD/3500HD
Cognito 110-90278 Allison Transmission Bracket | 2005-2019 GM Silverado/Sierra 2500HD/3500HD

Cognito

Cognito 110-90278 Allison Transmission Bracket | 2005-2019 GM Silverado/Sierra 2500HD/3500HD

Price
$54.95
Merchant 10357 Transmission Rear Housing Support | 2011-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10357 Transmission Rear Housing Support | 2011-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10357 Transmission Rear Housing Support | 2011-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$149.63
Premier Performance 1.113.1 1/2 inch Allison Transmission Repair Lines | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Premier Performance 1.113.1 1/2 inch Allison Transmission Repair Lines | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Premier Performance

Premier Performance 1.113.1 1/2 inch Allison Transmission Repair Lines | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$270
Merchant 22110 Flywheel Lock | 2001-2016 GM 2500HD/3500HD 6.6L Duramax
Merchant 22110 Flywheel Lock | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 22110 Flywheel Lock | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

Price
$16.72
Mishimoto MMTC-DMAX-11SL Transmission Cooler | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mishimoto MMTC-DMAX-11SL Transmission Cooler | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mishimoto

Mishimoto MMTC-DMAX-11SL Transmission Cooler | 2011-2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$448.95
Premier Performance 1.114.2 5/8 inch Allison Transmission Repair Lines | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Premier Performance 1.114.2 5/8 inch Allison Transmission Repair Lines | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Premier Performance

Premier Performance 1.114.2 5/8 inch Allison Transmission Repair Lines | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$325
Premier Performance 1.114.1 1/2 inch Allison Transmission Repair Lines | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Premier Performance 1.114.1 1/2 inch Allison Transmission Repair Lines | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Premier Performance

Premier Performance 1.114.1 1/2 inch Allison Transmission Repair Lines | 2015-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$270

FREE SHIPPING ON ALL ORDERS OVER $70

PRICE MATCH GUARANTEE

BUILD NOW, PAY LATER FINANCING OPTIONS

30-DAY RETURN SATISFACTION GUARANTEE

DIESEL TRUCK EXPERTS STANDING BY

Can We Help You Find Something?

Give us a call: +1-208-719-7400

2011-2016 6.6L Silverado & Sierra 2500HD/3500HD

THE GARAGE

The Garage

Welcome to The Garage – your one-stop shop for all your car care and maintenance needs. From premium oils and filters to top-notch car care products, we have everything you need to keep your vehicle running smoothly and looking its best. Whether you're a DIY enthusiast or a professional mechanic, our carefully curated selection of high-quality products will help you take care of your ride like never before.