2002 Buick rendezvous over heating.

What is your question?

I have a 2002 Buick rendezvous with 130k miles on it. Gaskets are all fine. Replaced water pump, temp sensor, and thermostat. You can drive the suv about 2 miles and it over heats. Thinking we have a clogged radiator but not exactly sure. When it over heats the resivoir tank sucks in a little and once you shut the car off the coolant rushes into the overflow tank. Almost like a vacuum once you turn off the car it flows fast. What the hell is going on with this damn thing? Tired of dumping money into it left and right I want it fixed!!