Rear heat does not work

The front heat works. The rear heat turns on but does not blow hot air, how do i fix this

Did you get an answer to this???
I am starting to think that the rear air in a tahoe is only rear air, not rear heat... I am not sure though. I tried mine the other day and I had the same results. I have since searched for a solution, but have not found one yet

Check your "blend door" operation in the back of the truck. Sometimes these can break and not blend or the little motor that contols them can go out. But the Tahoe will blow true heat out the vents in the rear. There is an actual heater core back there. At least there is one on my 2001.