Chevrolet Silverado 1500 engine hot warning and AC shutdown issue despite thermostat replacement on Chevrolet Silverado 1500

Some Chevrolet Silverado 1500 owners report experiencing the "Engine Hot" warning and AC shutdown issues even after replacing the thermostat. These problems may arise from a malfunctioning thermostat that fails to operate correctly, potentially leading to persistent overheating. Additionally, owners should be vigilant for cooling system leaks in the radiator or hoses, which can result in coolant loss and exacerbate overheating concerns. Clogged radiators, obstructed by dirt and debris, can further diminish cooling efficiency. Some owners also find that a faulty temperature sensor provides inaccurate readings, triggering the warning despite normal engine temperatures, which can be diagnosed with an OBD2 scanner. Furthermore, issues with the AC compressor can contribute to air conditioning failures. Lastly, discrepancies between coolant and engine block temperatures may prompt the warning, which can sometimes be resolved by clearing codes with a tuner. For ongoing issues, consulting a professional mechanic or dealership for a thorough inspection and repair is recommended.