The Genuine GM ACDelco 131-163 Thermostat is designed for front and rear mounting on 2001-2018 Duramax Diesel vehicles. Made of durable steel material, this thermostat kit includes a gasket and has an opening temperature of 185 °F. It is manufactured by GM and comes with a 1-year manufacturer warranty. The kit features bolt-on mounting and is tested for durability, ensuring reliable performance for your vehicle's engine cooling system.