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.