Mishimoto GMC Sierra 2500 HD Intercooler (11+ 6.6L Duramax LML, Silver) is a direct-fit performance intercooler engineered for 2011–2015 Duramax LML trucks. It replaces the factory cooler with a larger, more robust unit designed to reduce intake temperatures and improve airflow.

Built with cast aluminum end tanks and a heavy-duty bar-and-plate core, this Mishimoto intercooler increases core volume and thickness over the OEM cooler to better manage intake charge temperatures and EGTs under load. The design supports higher boost levels for both stock and modified applications without making unsupported performance claims. Offered in silver finish, the unit is made to withstand repeated use and is backed by Mishimoto’s Lifetime Warranty as stated by the manufacturer.

Features

• Precision-cast aluminum end tanks for durability
• Bar-and-plate core that is 73% thicker than factory
• 101% increase in core volume over OEM design
• Supports substantial boost pressures in stock or modified trucks
• Available in Sleek Silver finish; Mishimoto Lifetime Warranty

If you have questions or want help confirming fitment for your truck, call us directly — we’re happy to assist. We offer installation and customization services at two locations: Austin, Texas and Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) to speak with our techs or schedule service. If you’re considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov