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, all you need to do is turn to your friends here at Tier One and our lineup of Durmax LML performance parts and accessories. Tier one has all the parts and accessories for 2011-2016 Duramax LML trucks you need to completely transform your rig into a custom-built truck that can go toe-to-toe with the best of them on the street, out on the trail, or down at the track. We here at Tier One have everything from own own built Duramax LML transmissions and transmission rebuild kits that can hold more power than stock, to all the Duramax upgrades that will actually increase your truck's performance and capability like Duramax tuners, Duramax cold air intakes, Duramax exhaust kits, GM 2500 & 3500 leveling kits, GM 2500 & 3500 lift kits, and almost anything else you need to get the most our of your awesome Duramax LML build. Check out our built Allison transmissions or our built 6L90E transmissions. If you don't see what you're looking for, contact Tier One or call 602-399-5484!