2003 GMC Yukon "defrost hot side car cold" Questions

driver side hot air , pass and rear cold air The driver side is the only vent blowing hot air , the defrost and passenger and rear all blow cold air . baffle doors in ductwork stuck in position..

html-----------Heat blows cold on drivers side and hot on passenger side?http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html----------------This will help.Thanks

...defrost.html  --------Go through the procedure to confirm the issue. ------ Engine Overheats and heater blowing cold? ...

...hot-air-on-drivers-side-vents-only.html -------------- Temperature gauge does not move and no heat when heater is ON? ...

...defrost.html  --------Go through the procedure to confirm the issue. ------ Engine Overheats and heater blowing cold? ...

defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and defrost on it blows hot but again the heater below blows cold? It sounds like

...hot-air-on-drivers-side-vents-only.html -------------- Temperature gauge does not move and no heat when heater is ON? ...

...side blows hot. Both sides should blow hot The temp is set any temp and it still does the same thing. It is winter so I don't know if it would blow hot air if the a/c was running cause it is too cold ...

...hot air any help would be appreciated thank you To troubleshoot this types of problem,click the link ...

...hot but the vents/defrost start blowing cold air. Could there be a vent on the drivers floor that's not opening? most likely leak in one or more of the vacuum lines and or out door air damper not ...