Chevrolet Express 1500 rear heating system coolant leak due to rusted steel lines on Chevrolet Express 1500

Some Chevrolet Express 1500 owners report experiencing coolant leaks in the rear heating system due to rusted steel lines. Common symptoms of these leaks include overheating, a decrease in coolant levels, and colorful puddles forming beneath the vehicle. To identify the source of the leak, owners are advised to inspect the back of the engine with a white rag while the engine is hot and the coolant is topped up, which can help pinpoint whether the leak is from a hose or a head gasket. Repairing these rusted lines typically involves replacing the affected sections and may require pressure testing the cooling system to check for additional leaks. To prevent future leaks, regular maintenance and inspections of the steel lines are recommended, as early detection of rust can help avoid more significant issues. Prompt attention to coolant leaks is crucial to prevent further damage and ensure the vehicle operates properly.