2004.5-2005 Silverado & Sierra 2500 & 3500 Duramax LLY Transmission Coolers

Your Duramax LLY can generate a lot of heat, especially if you've turned up the power with serious performance mods, and your stock transmission cooler may not be able to keep up. Tier One's transmission coolers for 2004.5-2005 Silverado & Sierra 2500 & 3500 Duramax LLY trucks can keep your truck's transmission temperatures under control, even at extreme power levels or during heavy towing applications. Each of these Duramax LLY transmission coolers feature larger surface areas and more efficient designs than stock so that they dissipate heat much more effectively to prevent your truck from going into limp mode or hurting your transmission. We here at Tier One have both drop-in Duramax LLY transmission coolers, as well as universal auxiliary transmission coolers available for high-powered competition and sled pull builds. Make sure you also check out our 2004.5-2005 Duramax LLY Transmission Pans or our 2004.5-2005 Duramax LLY Complete Transmissions!