2007.5-2010 Duramax LMM 2500 & 3500 Parts & Accessories

The big 6.6L Duramax LML V8 under the hood of your 2007.5-2010 Silverado or Sierra 2500 or 3500 is hungry for more power and capability, and we here at Tier One have all the Duramax LML upgrades you need to totally transform your LML Duramax into a truck you can truly be proud of. Tier One's lineup of performance parts and accessories for 2007.5-2010 Duramax LML Silverados and Sierras can add a ton of power, improve performance, and increase your truck's capability in a big way. Tier One has everything from our very own built Duramax LML transmissions and transmission rebuild kits to bolt-on performance upgrades like Duramax LML tuners, Duramax LML cold air intakes, Duramax exhaust kits, GM 2500 & 3500 leveling kits, GM 2500 & 3500 lift kits, and so much more. Be Tier One and Done with your Duramax LML build by getting everything you need under one roof! Check out our built Allison transmissions or our built 6L90E transmissions. If you don't see something you're looking for, contact Tier One or call 602-399-5484!