The 2004.5-2005 model year LLY Duramax are unique models and the first of the series to receive variable geometry turbos. The trucks are a reliable platform with excellent support from the aftermarket. Whether you use your LLY Duramax for towing, high-performance driving, or off-roading, you can make it that much better with our parts! At HeavyWeight Diesel, we stock engine, suspension, transmission, axle, and many more upgrades from well-respected aftermarket manufacturers. Next to parts, HeavyWeight Diesel offers programmers that will add more than 100 horsepower to your truck without any major modifications required!
Trucks are constantly put under heavy pressure, with the suspension taking most of the abuse. But, don't just fix the suspension, take a look at one of the lift kits we offer at HeavyWeight Diesel, and drive your LLY Duramax in comfort. Browse through the visual mods we offer, and you'll notice that they fit your Duramax's lines perfectly. Pairing a lift-kit with a few visual modifications will make your truck stand out anywhere! Contact HeavyWeight Diesel staff and we'll answer any questions you may have about the parts we stock.