Description
**IN STOCK AND READY TO SHIP AS OF MARCH 11TH 2026!!!****
The LM2 Duramax diesel engines feature an advanced Active Thermal Management (ATM) cooling system designed to optimize fuel economy, performance, and emissions. This Engine Coolant Flow Control Valve plays a critical role by precisely controlling the coolant flow from the water pump, ensuring peak efficiency in all operating conditions. It combines a rotary control valve and a block control valve to independently manage coolant flow during warm-up (split cooling), eliminating the need for a traditional thermostat.
The valve directs coolant to critical components such as the turbocharger, EGR system, oil coolers, and heater core to efficiently regulate temperatures. The system also includes a de-gas circuit to remove trapped air, ensuring optimal operation.
Replaces GM Part Numbers: 40009179, 24001355, 55514504, 55511172, 55512723, 40009088
Fitment: 3.0L Duramax LM2 2020-2022 Silverado/Sierra & 2021-2024 SUV’s
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