GMC Sierra 3500 HD Radiator Coolant Hose - Mishimoto - Silicone, 6.6L Duramax - Blue - 2015. This direct-fit Mishimoto silicone coolant hose kit is designed for 6.6L Duramax trucks and provides a durable replacement for OE radiator hoses.

Built from high-grade silicone with five layers of heat-resistant embedded fibers, this kit improves temperature and pressure tolerance over stock rubber hoses. The kit includes CNC-machined billet quick-disconnect couplers that mate to the factory radiator for an OEM-style fit with no cutting required. T-bolt clamps are provided for secure sealing, and Mishimoto backs the hoses with a lifetime warranty. This blue finish is intended for owners who want a clean, durable upgrade that pairs well with performance cooling components.

Features

• Application: 6.6L Duramax (fits 2011–2016 Chevrolet/GMC; specific to 2015 GMC Sierra 3500 HD)
• Material: High-grade silicone with five reinforced fiber layers
• Includes CNC-machined billet quick-disconnect coupler
• Supplied T-bolt clamps for secure installation
• Offered in blue; lifetime warranty from Mishimoto

If you have questions or want help confirming fitment, call us directly. We offer installation and customization at our two locations in Austin, Texas and the Los Angeles, California area — 512-982-9393 (TX) and 562-981-6800 (CA). If you are considering multiple items, contact us for possible shipping discounts. We install on premises at both locations.

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