Genuine GM Engine Coolant Pipe O-Ring Seal 12623519 – Radiator Outlet Pipe SealProduct Description: The Genuine GM 12623519 Engine Coolant Pipe O Ring Seal is an OEM replacement sealing ring designed for radiator outlet and engine coolant pipe connections. This O ring creates a leak proof seal between coolant pipes and engine cooling system components, helping maintain proper coolant pressure and preventing coolant loss. Manufactured to Genuine GM specifications, it provides reliable sealing performance and is ideal when