2011-2016 Silverado & Sierra 2500 & 3500 Duramax LML Complete Transmissions

The Duramax LML under the hood of your HD Silverado or Sierra is more than capable of throwing down some serious horsepower and torque, but you'll need a transmission that can actually handle it. Tier One's built transmissions for 2011-2016 Silverado & Sierra 2500 & 3500 Duramax LML trucks can hold a tremendous amount of horsepower and torque, allowing you to use powerful tuning, big turbos, and oversized injectors without your transmission letting you down. Our built Duramax LML transmissions are also perfect for heavy towing and handle the load of big trailers, toy haulers, 5th wheels, and boats without overheating. We have everything from budget-friendly Duramax LML towing transmissions to all-out Duramax competition transmissions that will let you crush your opponents at the track. Even the best transmission build needs a reliable connection to the engine, so if you are piecing together your own build or need a specific stall speed, look at our 2011-2016 Duramax LML Torque Converters. Protect your investment from heat while towing by adding one of our 2011-2016 Duramax LML Transmission Coolers. If you aren't ready for a complete transmission swap but want to fix shifting issues, a valve body replacement is a great place to start, so check out our 2011-2016 Duramax LML Valve Bodies. To get the most out of your new transmission, consider upgrading your fluid capacity or installing a thermal bypass valve from our section of 2011-2016 Duramax LML Transmission Parts.