NHTSA Complaint #11620120 — 2010 CHEVROLET SILVERADO 1500

GM 3.0 diesel engine has a coolant control valve that fails putting the vehicle into a reduced power mode causing the vehicle to have significantly reduced acceleration and putting the engine fan at full to reduce engine heat. When stopped, the engine had been running very hot as you can hear the popping from the metal as it cools off. The part to repair this issue is 40009158 and is being replaced by 40009452. This part is on a nationwide backorder with hundreds on the waiting list just at this time for a repair and no clear picture of when parts will become available. Many other cases have been reported since 2021 for the same issue with the 3.0 GM Duramax engine with engine code/styles LM2 & LZO.