GMC Sierra 2500 HD Radiator Coolant Hose - Mishimoto - Silicone, 6.6L Duramax - Blue - '11-'16. This Mishimoto silicone coolant hose kit is a direct-fit replacement designed for 6.6L Duramax trucks from 2011 to 2016, combining durable construction with factory-style connections for an easy upgrade.

Built from high-grade silicone with five layers of heat-resistant embedded fibers, the kit increases pressure and temperature tolerance compared with aging OE rubber hoses. CNC-machined 6061 aluminum couplers provide a precise connection to the factory radiator and the included T-bolt clamps ensure secure, reliable sealing without cutting or modification. Available in blue to complement customized engine bays, this hose kit is suitable for both stock and modified trucks and is designed to mate with Mishimoto 6.6L Duramax aluminum performance radiators.

Features

• Five-layer heat-resistant silicone construction for improved durability
• 6061 CNC-machined billet aluminum coupler for direct factory fitment
• T-bolt clamps included for strong, repeatable seals
• Designed for Chevrolet/GMC 6.6L Duramax applications (2011–2016)
• Available in blue; includes Mishimoto lifetime warranty

If you have questions or want help confirming fitment, call us directly — we’re happy to assist. Visit either of our installation and customization shops in Austin, Texas or the Los Angeles, California area; we offer on‑site installation at both locations. Call: 512-982-9393 (TX) or 562-981-6800 (CA). If you’re considering multiple items, contact us for potential shipping discounts. We install on premises at both locations.

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