2004.5-2005 Silverado & Sierra 2500 & 3500 Duramax LLY Valve Bodies

Your Duramax LLY's valve body is critical to your transmission's operation, and at higher power levels or simply due to high mileage, your OEM valve body can suffer from cross-leaks and weak pressure. Tier One's performance valve bodies for 2004.5-2005 Silverado & Sierra 2500 & 3500 Duramax LLY trucks are designed to restore shifting performance and handle more power than stock. These Duramax LLY valve bodies use a combination of aftermarket upgrades and new OEM components to give your truck's transmission higher line pressures and excellent shifting. This ensures your clutches hold tight even when towing heavy up a grade. If your transmission clutches are already burnt out from low pressure or valve body failure, a new valve body won't bring them back, and you may be better suited getting a fresh start with one of our 2004.5-2005 Duramax LLY Complete Transmissions. A high-pressure valve body provides the holding power you need, but you need a converter that can handle that lock-up force, so pair your valve body with one of our 2004.5-2005 Duramax LLY Torque Converters. Electronics hate heat, so protect your new valve body and solenoids by keeping fluid temperatures down with our 2004.5-2005 Duramax LLY Transmission Coolers. When installing a new valve body, it's the perfect time to upgrade your fluid capacity or replace internal filters, so you can find deep pans and other essential components in our 2004.5-2005 Duramax LLY Transmission Parts.