Cadillac Repair: car smoking inside car from dashboard, cadillac deville, heater core

Question
why is my cadillac deville with the 4.9 engine smoking through my vents and antifreeze is leaking in on the passenger side floor from inside floor vent

Answer
This is because your HEATER CORE is leaking and must be replaced. You will need, If necessary, Electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture.  I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.