GMC Sierra 3500 HD Intercooler - Mishimoto - Mishimoto 6.6L Duramax LML - Black - `11-`15. This Mishimoto intercooler is a direct-fit upgrade for 2011–2015 GMC Sierra and Chevy Silverado trucks equipped with the 6.6L Duramax LML, designed to reduce intake temperatures and better manage exhaust gas temperatures for towing and high-load driving.

Engineered for durability and repeatable cooling performance, the Mishimoto intercooler features cast-aluminum end tanks and a bar-and-plate core that significantly increases internal volume and thickness compared to the factory unit. The larger core improves airflow and charge cooling, helping the turbo system run cooler under sustained loads. Built to support substantial boost pressure, this unit is suitable for stock trucks and vehicles with moderate to high modifications. The intercooler is finished in Stealth Black to match factory styling while resisting corrosion, and it is covered by Mishimoto’s Lifetime Warranty.

Features

• Direct-fit for 2011–2015 GMC Sierra 3500 HD / Chevrolet Silverado 2500–3500 HD with 6.6L Duramax LML
• All-aluminum cast end tanks for strength and heat transfer
• Bar-and-plate core for durable, efficient cooling
• 101% increase in core volume vs. factory
• 73% thicker core than OEM intercooler
• Stealth Black finish
• Designed to support higher boost and heavy-duty use; backed by Mishimoto Lifetime Warranty

If you have questions or want help confirming fitment, call us directly — we’re happy to help. We offer installation and customization services at our two locations in Austin, Texas and the Los Angeles, California area. 512-982-9393 (TX) and 562-981-6800 (CA). We install on premises at both locations.

Thinking of 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