Cadillac Repair: 1991 cadillac coupe diville, cadillac coupe, cadilac

Question
well it looks like i am having the same problems as other people i replaced my starter and my silinoid and it still wont start it does nothing wont crank all light and everything else works can you tell me what the problem is it is a 1991 cadilac coupe diville is it the ignition switch ??? or somthing else i need this fixed pls somone help

Answer
IS or HAS the CHECK ENGINE light on the dash ever illuminated while driving the vehicle prior to this problem ?.

Do you know how to retrieve the codes from the computers ?.

Are there any messages being displayed in the message center at all ?.

Are there any other lights illuminated on the dash that you have never seen before ?.