2011-2016 Duramax LML 2500 & 3500 Parts & Accessories

If you want to unlock the true potential of your already extremely capable and tough Duramax LML Silverado or Sierra HD, you need a drivetrain that can handle the stress. Tier One has all the parts and accessories for 2011-2016 Duramax LML trucks you need to bulletproof your transmission and put more power to the ground. We here at Tier One have everything from our own built Duramax LML Allison transmissions and rebuild kits that can hold more power than stock, to essential durability upgrades like high-performance torque converters, thermal bypass valves, and deep transmission pans. Whether you are towing heavy loads up a grade or launching at the track, Tier One has the drivetrain solutions to keep your Duramax LML moving forward. Check out our built Allison transmissions. If you don't see what you're looking for, contact Tier One or call 602-399-5484! If your factory transmission is slipping or you are pushing serious horsepower, a stock replacement just won't cut it, so take a look at our 2011-2016 Duramax LML Complete Transmissions. The factory torque converter is often the first weak point to fail when you start adding torque, so get better lock-up performance with one of our 2011-2016 Duramax LML Torque Converters. The Allison 1000 runs hot due to the factory thermal valve, so keep your fluid temps in check with our 2011-2016 Duramax LML Transmission Coolers. Sloppy shifts or pressure issues can be fixed with our updated 2011-2016 Duramax LML Valve Bodies. Finally, whether you need a deep transmission pan for extra fluid capacity or rebuild components, we have the parts you need in our section of 2011-2016 Duramax LML Transmission Parts.