The GM ACDelco 97241130 131-131 Thermostat Rear 180 Degree is a high-quality engine cooling component designed specifically for Duramax Diesel vehicles made between 2001-2018. This bolt-on thermostat is made of durable steel material and includes a gasket for easy installation. With a 180 °F opening temperature, it provides reliable performance and durability tested features. Manufactured by GM, this thermostat is a genuine part with interchange part numbers 97241130 and 131-131, ensuring a perfect fit and compatibility with your vehicle. Made in Japan, this thermostat is a crucial component for maintaining optimal engine temperature control.