[Kingprieto17]

Any ideas what it might be and how to fix? Thanks in advance.

 

[Sudderth]

add a can of refrigerant.

 

[tinman]

Blend door.

 

[Kingprieto17]

add a can of refrigerant.

thanks will give it a try

 

[Scooby]

I couldn't find a blend door re-learn procedure for your car but on my Tahoe it was simple as removing the fuses, waiting a minute, re-install, and start it up. Lasted for a few years until I eventually had to replace them.

 

[Sudderth]

No kidding, I tore mine apart to do the blend door and it turned out that I only needed to add a can of refrigerant.

 

[tinman]

No kidding, I tore mine apart to do the blend door and it turned out that I only needed to add a can of refrigerant.

Much easier way to go. If that doesn't work then that may only leave the 'hard way'.

 

[Kingprieto17]

Thanks a lot you all been really helpful finally got some days off work I will start working on it tomorrow 👍

 

[Helog]

My wifes 2012 CTS had the same issue. Cold on the driver's side and back vents but regular, not cold on the passenger side. I changed the blend door actuator myself on the passenger side hoping it would fix it but it didn't. I read somewhere that it could be low on freon. So I found a deal on Groupon for $69. I had it serviced, they evacuated and recharged the system and it has been working great ever since. Hope this helps anyone in this situation.