Cadillac Repair: overheating after radiator removal, coolant, cooling fans

Question
QUESTION: I just replaced my alternator on my 4.6L 99 deville and had to remove the radiator in the process.  after replacing everything i am reaching 230+ degrees in 5-8 min at idle.  is there a certain procedure to remove air from my cooling system?  Please, any help is appreciated.

ANSWER: Are you sure that you installed the correct type of coolant and got the mixture correct ?.

Did you replace the thermostat as you may have a blockage in it.

Did you install the 3 coolant sealant pellets to the new coolant ?.

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QUESTION: Correct coolant-yes
new thermostat-yes
coolant pellets-yes
Shes still over-heating.  Is there a way to bleed the air off the head?

Answer
You bleed out the air just as you would any older vehicle by raising the idle speed to about 1200 rpm's and turning on the heater and make sure yu are getting heat inside the vehicle.

The cooling fans don't come ON until the temp reaches approx 220 degrees Farenheit. So if the fans come ON at 230 and cools down the engine, I see no problem.