[redrail1]

I have a 2004 yukon the rear heat quit blowing heat will just blow out cold air what should I look for as a problem and do you know how it works,
I know there is a blower in the rear passenger side panel thanks

 

[tysmith]

Make sure your antifreeze is topped off.
In my '95 'burb, the rear heat quit working. Expansion tank was empty, and I found a hole in the aluminum line on the passenger side. The previous owner put running boards on and the screw was just hitting the line, and eventually rubbed a hole. That was my only experience with no rear heat...

 

[oosel]

Does anyone know where and or how to get to the rear heater core?