Industrial 12571261 Engine Coolant Thermostat Water Inlet Assembly

Industrial 12571261 Engine Coolant Thermostat Water Inlet Assembly is a GM-engine cooling component that combines the thermostat and water inlet into a single assembly for 1997–2004 GM applications. Part number 12571261 is also listed as 15-10412, reflecting an alternate designation you may encounter when sourcing replacements. It functions as the thermostat housing and water inlet path in the engine cooling system, helping regulate coolant flow to maintain optimal operating temperature. Designed to fit GM engines from the late 1990s to early 2000s, this assembly serves as a direct replacement where a thermostat-water inlet unit is required in the cooling system. Verify compatibility by matching the part number 12571261 or the alternate 15-10412 with your vehicle's service information.