ACDelco Engine Coolant Thermostat Assembly

The ACDelco Engine Coolant Thermostat Assembly (also called an engine thermostat or coolant thermostat) helps regulate engine operating temperature. It opens and closes to control coolant flow between the engine and the radiator. This helps the engine warm up efficiently and then stay within its intended temperature range.

Key Features:

• Regulates coolant flow to help maintain consistent engine operating temperature
• Helps the engine reach operating temperature promptly for efficient combustion and heater performance
• Supplied as an assembly, so it is ready to install as a complete unit
• Built to ACDelco quality standards, the brand behind General Motors original equipment and genuine GM parts
• Helps protect against overheating and overcooling, which can cause engine wear

A properly working thermostat supports cooling system health, fuel efficiency, and engine longevity. Replacing a worn or sticking thermostat is a common way to restore normal temperature control. Each variant in this product line is designed for its specific application, so select the part number that matches your engine.