Sale Off OEM Engine Coolant Flow Control Valve - 20-23 GM 3.0L LM2 Duramax Diesel - 24001355 OEM Engine Coolant Flow Control Valve - 24001355 The LM2 Duramax diesel engines feature an advanced Active Thermal Management (ATM) cooling system designed to optimize fuel economy, performance, and... MSRP: Was: Now: $375.00 Out of stock. Please Call For Availability