Cadillac Repair: 1998 cADILLAC DElegance, blown head gasket, radiator cap

Question
How do you know if you have a blown head gasket and how much to replace.

Answer
Engine constantly overheats even though the cooling fans are running.

Bubbles coming out of the radiator with the radiator cap removed after engine is warmed up.

CAUTION: Remove the radiator cap SLOWLY as the fluid is under pressure and is extremly HOT !!!!!.