Cadillac Repair: 99 Cadillac Catera heater core, cadillac catera, steel tubes

Question
I have a 99 Catera with anti-freeze leaking out of a drain hose that comes out of the firewall. I am told i have a bad heater core.  How do you replace it? I already have the passenger side glove compartment out and I only see the steel tubes running in thru the firewall.  

Answer
You will need to contact me at:


 onlineautohelp@msn.com


In order for me to provide you with pictures, Instructions and electrical schematics (pictures).
PLEASE include your original question(s) and the MAKE-MODEL-YEAR and ENGINE SIZE of your vehicle when you contact me.

PLEASE tell me if you do your own repairs and or your skill level of auto repair. This is VERY VERY important if I am to be able to help you repair your own vehicle.