My 99 cadillac deville's heater core went out an it immediately started getting hot I let it cool off an by-passed it an it still was overheating so I changed the thermostat an the waterpump an its still getting hot.so I took the top radiator hose off an let it run but no water came thru.wats wrong ? Sum body help

I think you just need to contact the service. By the way, if we talk about services, I recently discovered a very cool and fast mobile service Fresh Car Valeting Harrogate. These guys can come to any point in Harrogate and bring your car to a perfectly clean condition. I love using such services when I come with my family and dogs on holiday. It saves me a lot of time.