GMC Sierra 2500 coolant hose connector failure due to defective plastic causing coolant leak risk on GMC Sierra 2500

Some GMC Sierra 2500 owners report experiencing coolant hose connector failures due to defective plastic, which can lead to coolant leaks. Common causes of these leaks include loose hose connections, a broken radiator, or a failed water pump. These coolant leaks may result in white exhaust smoke if coolant enters the combustion chamber. Owners are advised to allow the engine to cool completely before attempting repairs on the cooling system. Additionally, some may notice yellow, crusty residue at the upper hose radiator connector neck and at the plastic "Y" connector linked to the heater core, overflow tank, and radiator. Bleeding air from the cooling system, particularly when replacing the lower outlet hose from the surge tank, can also pose challenges. Promptly addressing these coolant leaks is crucial to avoid further complications associated with defective connectors and other cooling system components. Regular inspections and maintenance can aid in identifying and resolving these issues before they worsen.