DmaxStore has a collection of LLY Duramax parts for sale. Check out our selection of products that are compatible with a 2004.5–2005 Chevy/GMC Duramax Truck.

Finding reliable LLY Duramax parts for your 2004.5–2005 Chevy/GMC Duramax Truck isn’t always easy. At DmaxStore, you’ll find the best quality products that are perfect for everyone, from DIYers to vehicle repair professionals.

Shop for all the necessary items, such as steering & suspension, oil system components, and engine parts. We’ve got everything you need to repair and upgrade your 2004.5–2005 Chevy/GMC Duramax Truck. Select one of the categories to view the full line of products, learn more about specific LLY Duramax parts, and review the product description.

After seeing some injector issues with the LB7, the LLY received redesigned injectors and valve covers for improved reliability and allowed for easier replacement. The turbocharger was also a welcomed upgrade with the new variable vane technology that was now available from Garrett Turbochargers. The size and design of the turbo were all new and now had variable vanes, improving drivability and performance. This is the largest turbocharger, 62mm, ever fitted to a factory Duramax. This resulted in an increased power output of 310 horsepower and 520 lb.-ft. Unfortunately, this did not come without its own share of issues. One prominent issue was overheating leading to head gasket complications early on as the radiator and intercooler remained unchanged from the original LB7 Duramax and were undersized.

Do you have an LLY? Use your VIN to verify. If the 8th digit of your VIN is a “2”, you have an LLY. DmaxStore has been in business since 2004, and we’ve always strived to provide our customers with top-quality parts and service. Call (877) 469-3629 or fill out our contact form if you have any questions, and we’ll get back to you as soon as possible.