Odd Issue with Heat

[Foggy]

2014 Yukon Denali: have noticed when it's pretty cold out
The heat position - feet position- doesn't really put "hot" air out at my driver's feet
The heat is very hot- I can set it to the mix feet/vent position, and it's really hot
And my wife says her side is putting out hot air at her feet....
It's like I'm getting a low volume of HOT air coming out... and almost like a "leak" of
cold air mixed in with it...
All the settings : mode, temp, etc.. and rear heat work very well...
just not feeling "HOT" air at drivers feet

Any Ideas on a good starting point to start this investigation would be appreciated

 

[Joseph Garcia]

Sounds like a mixing damper positioning issue. Folks with direct experience in this area will chime in.

 

[Foggy]

I wonder if I just do a "reset" thru the bcm if it will help..
I'll try that with my BiDirectional scanner... i think it will do that !!!