Maintain or repair the cooling system in your 2001-2004 Chevy/GMC 6.6L LB7 Duramax with the selection of Thermostats & Housings. Find factory-style replacements and upgraded billet thermostat housings to fit your needs. Higher temperature, stock, and lower temperature thermostats are offered to customize your cooling system to fit your needs. Get the high-quality part you need from Mishimoto, Dorman and many other at XDP!